diff --git a/package-lock.json b/package-lock.json
index e26ae52..3b500d8 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -5713,6 +5713,12 @@
       "resolved": "https://registry.npmjs.org/ctype/-/ctype-0.5.3.tgz",
       "integrity": "sha1-gsGMJGH3QRTvFsE1IkrQuRRMoS8="
     },
+    "cuint": {
+      "version": "0.2.2",
+      "resolved": "https://registry.npmjs.org/cuint/-/cuint-0.2.2.tgz",
+      "integrity": "sha512-d4ZVpCW31eWwCMe1YT3ur7mUDnTXbgwyzaL320DrcRT45rfjYxkt5QWLrmOJ+/UEAI2+fQgKe/fCjR8l4TpRgw==",
+      "dev": true
+    },
     "currently-unhandled": {
       "version": "0.4.1",
       "resolved": "https://registry.npmjs.org/currently-unhandled/-/currently-unhandled-0.4.1.tgz",
@@ -6161,88 +6167,6 @@
         }
       }
     },
-    "directory-encoder": {
-      "version": "0.7.2",
-      "resolved": "https://registry.npmjs.org/directory-encoder/-/directory-encoder-0.7.2.tgz",
-      "integrity": "sha1-WbTiqk8lQi9sY7UntGL14tDdLFg=",
-      "dev": true,
-      "requires": {
-        "fs-extra": "^0.23.1",
-        "handlebars": "^1.3.0",
-        "img-stats": "^0.5.2"
-      },
-      "dependencies": {
-        "async": {
-          "version": "0.2.10",
-          "resolved": "https://registry.npmjs.org/async/-/async-0.2.10.tgz",
-          "integrity": "sha1-trvgsGdLnXGXCMo43owjfLUmw9E=",
-          "dev": true,
-          "optional": true
-        },
-        "fs-extra": {
-          "version": "0.23.1",
-          "resolved": "https://registry.npmjs.org/fs-extra/-/fs-extra-0.23.1.tgz",
-          "integrity": "sha1-ZhHbpq3yq43Jxp+rN83fiBgVfj0=",
-          "dev": true,
-          "requires": {
-            "graceful-fs": "^4.1.2",
-            "jsonfile": "^2.1.0",
-            "path-is-absolute": "^1.0.0",
-            "rimraf": "^2.2.8"
-          }
-        },
-        "handlebars": {
-          "version": "1.3.0",
-          "resolved": "https://registry.npmjs.org/handlebars/-/handlebars-1.3.0.tgz",
-          "integrity": "sha1-npsTCpPjiUkTItl1zz7BgYw3zjQ=",
-          "dev": true,
-          "requires": {
-            "optimist": "~0.3",
-            "uglify-js": "~2.3"
-          }
-        },
-        "jsonfile": {
-          "version": "2.4.0",
-          "resolved": "https://registry.npmjs.org/jsonfile/-/jsonfile-2.4.0.tgz",
-          "integrity": "sha1-NzaitCi4e72gzIO1P6PWM6NcKug=",
-          "dev": true,
-          "requires": {
-            "graceful-fs": "^4.1.6"
-          }
-        },
-        "optimist": {
-          "version": "0.3.7",
-          "resolved": "https://registry.npmjs.org/optimist/-/optimist-0.3.7.tgz",
-          "integrity": "sha1-yQlBrVnkJzMokjB00s8ufLxuwNk=",
-          "dev": true,
-          "requires": {
-            "wordwrap": "~0.0.2"
-          }
-        },
-        "source-map": {
-          "version": "0.1.43",
-          "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.1.43.tgz",
-          "integrity": "sha1-wkvBRspRfBRx9drL4lcbK3+eM0Y=",
-          "dev": true,
-          "optional": true,
-          "requires": {
-            "amdefine": ">=0.0.4"
-          }
-        },
-        "uglify-js": {
-          "version": "2.3.6",
-          "resolved": "https://registry.npmjs.org/uglify-js/-/uglify-js-2.3.6.tgz",
-          "integrity": "sha1-+gmEdwtCi3qbKoBY9GNV0U/vIRo=",
-          "dev": true,
-          "optional": true,
-          "requires": {
-            "async": "~0.2.6",
-            "optimist": "~0.3.5",
-            "source-map": "~0.1.7"
-          }
-        }
-      }
-    },
     "discontinuous-range": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/discontinuous-range/-/discontinuous-range-1.0.0.tgz",
@@ -8044,7 +7968,8 @@
         "ansi-regex": {
           "version": "2.1.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "aproba": {
           "version": "1.2.0",
@@ -8065,12 +7990,14 @@
         "balanced-match": {
           "version": "1.0.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "brace-expansion": {
           "version": "1.1.11",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "balanced-match": "^1.0.0",
             "concat-map": "0.0.1"
@@ -8085,17 +8012,20 @@
         "code-point-at": {
           "version": "1.1.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "concat-map": {
           "version": "0.0.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "console-control-strings": {
           "version": "1.1.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "core-util-is": {
           "version": "1.0.2",
@@ -8212,7 +8142,8 @@
         "inherits": {
           "version": "2.0.3",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "ini": {
           "version": "1.3.5",
@@ -8224,6 +8155,7 @@
           "version": "1.0.0",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "number-is-nan": "^1.0.0"
           }
@@ -8238,6 +8170,7 @@
           "version": "3.0.4",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "brace-expansion": "^1.1.7"
           }
@@ -8245,12 +8178,14 @@
         "minimist": {
           "version": "0.0.8",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "minipass": {
           "version": "2.3.5",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "safe-buffer": "^5.1.2",
             "yallist": "^3.0.0"
@@ -8269,6 +8204,7 @@
           "version": "0.5.1",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "minimist": "0.0.8"
           }
@@ -8349,7 +8285,8 @@
         "number-is-nan": {
           "version": "1.0.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "object-assign": {
           "version": "4.1.1",
@@ -8361,6 +8298,7 @@
           "version": "1.4.0",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "wrappy": "1"
           }
@@ -8446,7 +8384,8 @@
         "safe-buffer": {
           "version": "5.1.2",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "safer-buffer": {
           "version": "2.1.2",
@@ -8482,6 +8421,7 @@
           "version": "1.0.2",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "code-point-at": "^1.0.0",
             "is-fullwidth-code-point": "^1.0.0",
@@ -8501,6 +8441,7 @@
           "version": "3.0.1",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "ansi-regex": "^2.0.0"
           }
@@ -8544,12 +8485,14 @@
         "wrappy": {
           "version": "1.0.2",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "yallist": {
           "version": "3.0.3",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         }
       }
     },
@@ -10722,15 +10665,6 @@
       "resolved": "https://registry.npmjs.org/ignore/-/ignore-3.3.10.tgz",
       "integrity": "sha512-Pgs951kaMm5GXP7MOvxERINe3gsaVjUWFm+UZPSq9xYriQAksyhg0csnS0KXSNRD5NmNdapXEpjxG49+AKh/ug=="
     },
-    "img-stats": {
-      "version": "0.5.2",
-      "resolved": "https://registry.npmjs.org/img-stats/-/img-stats-0.5.2.tgz",
-      "integrity": "sha1-wgNJbELy2esuWrgjL6dWurMsnis=",
-      "dev": true,
-      "requires": {
-        "xmldom": "^0.1.19"
-      }
-    },
     "immutable": {
       "version": "3.8.2",
       "resolved": "https://registry.npmjs.org/immutable/-/immutable-3.8.2.tgz",
@@ -22429,67 +22363,37 @@
       }
     },
     "postcss-url": {
-      "version": "5.1.2",
-      "resolved": "https://registry.npmjs.org/postcss-url/-/postcss-url-5.1.2.tgz",
-      "integrity": "sha1-mLMWW+jVkkccsMqt3iwNH4MvEz4=",
+      "version": "10.1.3",
+      "resolved": "https://registry.npmjs.org/postcss-url/-/postcss-url-10.1.3.tgz",
+      "integrity": "sha512-FUzyxfI5l2tKmXdYc6VTu3TWZsInayEKPbiyW+P6vmmIrrb4I6CGX0BFoewgYHLK+oIL5FECEK02REYRpBvUCw==",
       "dev": true,
       "requires": {
-        "directory-encoder": "^0.7.2",
-        "js-base64": "^2.1.5",
-        "mime": "^1.2.11",
-        "minimatch": "^3.0.0",
-        "mkdirp": "^0.5.0",
-        "path-is-absolute": "^1.0.0",
-        "postcss": "^5.0.0"
+        "make-dir": "~3.1.0",
+        "mime": "~2.5.2",
+        "minimatch": "~3.0.4",
+        "xxhashjs": "~0.2.2"
       },
       "dependencies": {
-        "chalk": {
-          "version": "1.1.3",
-          "resolved": "https://registry.npmjs.org/chalk/-/chalk-1.1.3.tgz",
-          "integrity": "sha1-qBFcVeSnAv5NFQq9OHKCKn4J/Jg=",
+        "make-dir": {
+          "version": "3.1.0",
+          "resolved": "https://registry.npmjs.org/make-dir/-/make-dir-3.1.0.tgz",
+          "integrity": "sha512-g3FeP20LNwhALb/6Cz6Dd4F2ngze0jz7tbzrD2wAV+o9FeNHe4rL+yK2md0J/fiSf1sa1ADhXqi5+oVwOM/eGw==",
           "dev": true,
           "requires": {
-            "ansi-styles": "^2.2.1",
-            "escape-string-regexp": "^1.0.2",
-            "has-ansi": "^2.0.0",
-            "strip-ansi": "^3.0.0",
-            "supports-color": "^2.0.0"
-          },
-          "dependencies": {
-            "supports-color": {
-              "version": "2.0.0",
-              "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-2.0.0.tgz",
-              "integrity": "sha1-U10EXOa2Nj+kARcIRimZXp3zJMc=",
-              "dev": true
-            }
+            "semver": "^6.0.0"
           }
         },
-        "has-flag": {
-          "version": "1.0.0",
-          "resolved": "https://registry.npmjs.org/has-flag/-/has-flag-1.0.0.tgz",
-          "integrity": "sha1-nZ55MWXOAXoA8AQYxD+UKnsdEfo=",
+        "mime": {
+          "version": "2.5.2",
+          "resolved": "https://registry.npmjs.org/mime/-/mime-2.5.2.tgz",
+          "integrity": "sha512-tqkh47FzKeCPD2PUiPB6pkbMzsCasjxAfC62/Wap5qrUWcb+sFasXUC5I3gYM5iBM8v/Qpn4UK0x+j0iHyFPDg==",
           "dev": true
         },
-        "postcss": {
-          "version": "5.2.18",
-          "resolved": "https://registry.npmjs.org/postcss/-/postcss-5.2.18.tgz",
-          "integrity": "sha512-zrUjRRe1bpXKsX1qAJNJjqZViErVuyEkMTRrwu4ud4sbTtIBRmtaYDrHmcGgmrbsW3MHfmtIf+vJumgQn+PrXg==",
-          "dev": true,
-          "requires": {
-            "chalk": "^1.1.3",
-            "js-base64": "^2.1.9",
-            "source-map": "^0.5.6",
-            "supports-color": "^3.2.3"
-          }
-        },
-        "supports-color": {
-          "version": "3.2.3",
-          "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-3.2.3.tgz",
-          "integrity": "sha1-ZawFBLOVQXHYpklGsq48u4pfVPY=",
-          "dev": true,
-          "requires": {
-            "has-flag": "^1.0.0"
-          }
+        "semver": {
+          "version": "6.3.0",
+          "resolved": "https://registry.npmjs.org/semver/-/semver-6.3.0.tgz",
+          "integrity": "sha512-b39TBaTSfV6yBrapU89p5fKekE2m/NwnDocOVruQFS1/veMgdzuPcnOM34M6CwxW8jH/lxEa5rBoDeUwu5HHTw==",
+          "dev": true
         }
       }
     },
@@ -27749,17 +27653,20 @@
       "resolved": "https://registry.npmjs.org/xmlbuilder/-/xmlbuilder-11.0.1.tgz",
       "integrity": "sha512-fDlsI/kFEx7gLvbecc0/ohLG50fugQp8ryHzMTuW9vSa1GJ0XYWKnhsUx7oie3G98+r56aTQIUB4kht42R3JvA=="
     },
-    "xmldom": {
-      "version": "0.1.27",
-      "resolved": "https://registry.npmjs.org/xmldom/-/xmldom-0.1.27.tgz",
-      "integrity": "sha1-1QH5ezvbQDr4757MIFcxh6rawOk=",
-      "dev": true
-    },
     "xtend": {
       "version": "4.0.2",
       "resolved": "https://registry.npmjs.org/xtend/-/xtend-4.0.2.tgz",
       "integrity": "sha512-LKYU1iAXJXUgAXn9URjiu+MWhyUXHsvfp7mcuYm9dSUKK0/CjtrUwFAxD82/mCWbtLsGjFIad0wIsod4zrTAEQ=="
     },
+    "xxhashjs": {
+      "version": "0.2.2",
+      "resolved": "https://registry.npmjs.org/xxhashjs/-/xxhashjs-0.2.2.tgz",
+      "integrity": "sha512-AkTuIuVTET12tpsVIQo+ZU6f/qDmKuRUcjaqR+OIvm+aCBsZ95i7UVY5WJ9TMsSaZ0DA2WxoZ4acu0sPH+OKAw==",
+      "dev": true,
+      "requires": {
+        "cuint": "^0.2.2"
+      }
+    },
     "y18n": {
       "version": "3.2.1",
       "resolved": "https://registry.npmjs.org/y18n/-/y18n-3.2.1.tgz",
diff --git a/package.json b/package.json
index b4acf49..201bc91 100644
--- a/package.json
+++ b/package.json
@@ -227,7 +227,7 @@
     "postcss-nested": "^4.1.2",
     "postcss-nesting": "^2.3.1",
     "postcss-selector-not": "^2.0.0",
-    "postcss-url": "^5.1.2",
+    "postcss-url": "^10.1.3",
     "react-test-renderer": "^16.8.6",
     "react-transform-catch-errors": "1.0.2",
     "react-transform-hmr": "1.0.4",
diff --git a/yarn.lock b/yarn.lock
index d56fd7f..d6c4d0f 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -945,10 +945,6 @@ async@^1.4.0, async@~1.5.0:
   version "1.5.2"
   resolved "https://registry.yarnpkg.com/async/-/async-1.5.2.tgz#ec6a61ae56480c0c3cb241c95618e20892f9672a"
 
-async@~0.2.6:
-  version "0.2.10"
-  resolved "https://registry.yarnpkg.com/async/-/async-0.2.10.tgz#b6bbe0b0674b9d719708ca38de8c237cb526c3d1"
-
 async@~0.9.0:
   version "0.9.2"
   resolved "https://registry.yarnpkg.com/async/-/async-0.9.2.tgz#aea74d5e61c1f899613bf64bda66d4c78f2fd17d"
@@ -3333,6 +3329,10 @@ ctype@0.5.3:
   version "0.5.3"
   resolved "https://registry.yarnpkg.com/ctype/-/ctype-0.5.3.tgz#82c18c2461f74114ef16c135224ad0b9144ca12f"
 
+cuint@^0.2.2:
+  version "0.2.2"
+  resolved "https://registry.yarnpkg.com/cuint/-/cuint-0.2.2.tgz#408086d409550c2631155619e9fa7bcadc3b991b"
+
 currently-unhandled@^0.4.1:
   version "0.4.1"
   resolved "https://registry.yarnpkg.com/currently-unhandled/-/currently-unhandled-0.4.1.tgz#988df33feab191ef799a61369dd76c17adf957ea"
@@ -3701,14 +3701,6 @@ dir-glob@^3.0.0, dir-glob@^3.0.1:
   dependencies:
     path-type "^4.0.0"
 
-directory-encoder@^0.7.2:
-  version "0.7.2"
-  resolved "https://registry.yarnpkg.com/directory-encoder/-/directory-encoder-0.7.2.tgz#59b4e2aa4f25422f6c63b527b462f5e2d0dd2c58"
-  dependencies:
-    fs-extra "^0.23.1"
-    handlebars "^1.3.0"
-    img-stats "^0.5.2"
-
 discontinuous-range@1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/discontinuous-range/-/discontinuous-range-1.0.0.tgz#e38331f0844bba49b9a9cb71c771585aab1bc65a"
@@ -5002,15 +4994,6 @@ from2@^2.1.0, from2@^2.1.1, from2@^2.3.0:
     inherits "^2.0.1"
     readable-stream "^2.0.0"
 
-fs-extra@^0.23.1:
-  version "0.23.1"
-  resolved "https://registry.yarnpkg.com/fs-extra/-/fs-extra-0.23.1.tgz#6611dba6adf2ab8dc9c69fab37cddf8818157e3d"
-  dependencies:
-    graceful-fs "^4.1.2"
-    jsonfile "^2.1.0"
-    path-is-absolute "^1.0.0"
-    rimraf "^2.2.8"
-
 fs-extra@^0.30.0:
   version "0.30.0"
   resolved "https://registry.yarnpkg.com/fs-extra/-/fs-extra-0.30.0.tgz#f233ffcc08d4da7d432daa449776989db1df93f0"
@@ -5567,14 +5550,6 @@ handle-thing@^1.2.5:
   version "1.2.5"
   resolved "https://registry.yarnpkg.com/handle-thing/-/handle-thing-1.2.5.tgz#fd7aad726bf1a5fd16dfc29b2f7a6601d27139c4"
 
-handlebars@^1.3.0:
-  version "1.3.0"
-  resolved "https://registry.yarnpkg.com/handlebars/-/handlebars-1.3.0.tgz#9e9b130a93e389491322d975cf3ec1818c37ce34"
-  dependencies:
-    optimist "~0.3"
-  optionalDependencies:
-    uglify-js "~2.3"
-
 handlebars@^4.0.3, handlebars@^4.1.0:
   version "4.1.2"
   resolved "https://registry.yarnpkg.com/handlebars/-/handlebars-4.1.2.tgz#b6b37c1ced0306b221e094fc7aca3ec23b131b67"
@@ -6079,12 +6054,6 @@ ignore@^5.1.1:
   version "5.1.2"
   resolved "https://registry.yarnpkg.com/ignore/-/ignore-5.1.2.tgz#e28e584d43ad7e92f96995019cc43b9e1ac49558"
 
-img-stats@^0.5.2:
-  version "0.5.2"
-  resolved "https://registry.yarnpkg.com/img-stats/-/img-stats-0.5.2.tgz#c203496c42f2d9eb2e5ab8232fa756bab32c9e2b"
-  dependencies:
-    xmldom "^0.1.19"
-
 immutable@^3.0.0, immutable@^3.8.1:
   version "3.8.2"
   resolved "https://registry.yarnpkg.com/immutable/-/immutable-3.8.2.tgz#c2439951455bb39913daf281376f1530e104adf3"
@@ -6999,7 +6968,7 @@ jmespath@0.15.0:
   version "0.15.0"
   resolved "https://registry.yarnpkg.com/jmespath/-/jmespath-0.15.0.tgz#a3f222a9aae9f966f5d27c796510e28091764217"
 
-js-base64@^2.1.5, js-base64@^2.1.8, js-base64@^2.1.9:
+js-base64@^2.1.8, js-base64@^2.1.9:
   version "2.5.1"
   resolved "https://registry.yarnpkg.com/js-base64/-/js-base64-2.5.1.tgz#1efa39ef2c5f7980bb1784ade4a8af2de3291121"
 
@@ -7966,6 +7935,12 @@ make-dir@^1.0.0:
   dependencies:
     pify "^3.0.0"
 
+make-dir@~3.1.0:
+  version "3.1.0"
+  resolved "https://registry.yarnpkg.com/make-dir/-/make-dir-3.1.0.tgz#415e967046b3a7f1d185277d84aa58203726a13f"
+  dependencies:
+    semver "^6.0.0"
+
 make-error-cause@^1.0.1:
   version "1.2.2"
   resolved "https://registry.yarnpkg.com/make-error-cause/-/make-error-cause-1.2.2.tgz#df0388fcd0b37816dff0a5fb8108939777dcbc9d"
@@ -8248,9 +8223,9 @@ mime@1.6.0, mime@^1.2.11, mime@^1.5.0:
   version "1.6.0"
   resolved "https://registry.yarnpkg.com/mime/-/mime-1.6.0.tgz#32cd9e5c64553bd58d19a568af452acff04981b1"
 
-"mime@>= 1.2.6", mime@^2.2.0, mime@^2.4.3:
-  version "2.4.4"
-  resolved "https://registry.yarnpkg.com/mime/-/mime-2.4.4.tgz#bd7b91135fc6b01cde3e9bae33d659b63d8857e5"
+"mime@>= 1.2.6", mime@^2.2.0, mime@^2.4.3, mime@~2.5.2:
+  version "2.5.2"
+  resolved "https://registry.yarnpkg.com/mime/-/mime-2.5.2.tgz#6e3dc6cc2b9510643830e5f19d5cb753da5eeabe"
 
 mimic-fn@^1.0.0:
   version "1.2.0"
@@ -8285,9 +8260,9 @@ minimatch@0.3:
     lru-cache "2"
     sigmund "~1.0.0"
 
-"minimatch@2 || 3", minimatch@^3.0.0, minimatch@^3.0.2, minimatch@^3.0.3, minimatch@^3.0.4, minimatch@~3.0.2:
-  version "3.0.4"
-  resolved "https://registry.yarnpkg.com/minimatch/-/minimatch-3.0.4.tgz#5166e286457f03306064be5497e8dbb0c3d32083"
+"minimatch@2 || 3", minimatch@^3.0.0, minimatch@^3.0.2, minimatch@^3.0.3, minimatch@^3.0.4, minimatch@~3.0.2, minimatch@~3.0.4:
+  version "3.0.8"
+  resolved "https://registry.yarnpkg.com/minimatch/-/minimatch-3.0.8.tgz#5e6a59bd11e2ab0de1cfb843eb2d82e546c321c1"
   dependencies:
     brace-expansion "^1.1.7"
 
@@ -9423,12 +9398,6 @@ optimist@^0.6.1:
     minimist "~0.0.1"
     wordwrap "~0.0.2"
 
-optimist@~0.3, optimist@~0.3.5:
-  version "0.3.7"
-  resolved "https://registry.yarnpkg.com/optimist/-/optimist-0.3.7.tgz#c90941ad59e4273328923074d2cf2e7cbc6ec0d9"
-  dependencies:
-    wordwrap "~0.0.2"
-
 optionator@^0.8.1, optionator@^0.8.2:
   version "0.8.2"
   resolved "https://registry.yarnpkg.com/optionator/-/optionator-0.8.2.tgz#364c5e409d3f4d6301d6c0b4c05bba50180aeb64"
@@ -9764,6 +9733,16 @@ passport-oauth2@1.x.x:
     uid2 "0.0.x"
     utils-merge "1.x.x"
 
+passport-oauth2@^1.5.0:
+  version "1.6.1"
+  resolved "https://registry.yarnpkg.com/passport-oauth2/-/passport-oauth2-1.6.1.tgz#c5aee8f849ce8bd436c7f81d904a3cd1666f181b"
+  dependencies:
+    base64url "3.x.x"
+    oauth "0.9.x"
+    passport-strategy "1.x.x"
+    uid2 "0.0.x"
+    utils-merge "1.x.x"
+
 passport-oauth@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/passport-oauth/-/passport-oauth-1.0.0.tgz#90aff63387540f02089af28cdad39ea7f80d77df"
@@ -10326,17 +10305,14 @@ postcss-unique-selectors@^2.0.2:
     postcss "^5.0.4"
     uniqs "^2.0.0"
 
-postcss-url@^5.1.2:
-  version "5.1.2"
-  resolved "https://registry.yarnpkg.com/postcss-url/-/postcss-url-5.1.2.tgz#98b3165be8d592471cb0caadde2c0d1f832f133e"
+postcss-url@^10.1.3:
+  version "10.1.3"
+  resolved "https://registry.yarnpkg.com/postcss-url/-/postcss-url-10.1.3.tgz#54120cc910309e2475ec05c2cfa8f8a2deafdf1e"
   dependencies:
-    directory-encoder "^0.7.2"
-    js-base64 "^2.1.5"
-    mime "^1.2.11"
-    minimatch "^3.0.0"
-    mkdirp "^0.5.0"
-    path-is-absolute "^1.0.0"
-    postcss "^5.0.0"
+    make-dir "~3.1.0"
+    mime "~2.5.2"
+    minimatch "~3.0.4"
+    xxhashjs "~0.2.2"
 
 postcss-value-parser@^3.0.1, postcss-value-parser@^3.0.2, postcss-value-parser@^3.1.1, postcss-value-parser@^3.1.2, postcss-value-parser@^3.2.3, postcss-value-parser@^3.3.0:
   version "3.3.1"
@@ -12371,12 +12347,6 @@ source-map@^0.6.0, source-map@^0.6.1, source-map@~0.6.1:
   version "0.6.1"
   resolved "https://registry.yarnpkg.com/source-map/-/source-map-0.6.1.tgz#74722af32e9614e9c287a8d0bbde48b5e2f1a263"
 
-source-map@~0.1.7:
-  version "0.1.43"
-  resolved "https://registry.yarnpkg.com/source-map/-/source-map-0.1.43.tgz#c24bc146ca517c1471f5dacbe2571b2b7f9e3346"
-  dependencies:
-    amdefine ">=0.0.4"
-
 sparse-bitfield@^3.0.3:
   version "3.0.3"
   resolved "https://registry.yarnpkg.com/sparse-bitfield/-/sparse-bitfield-3.0.3.tgz#ff4ae6e68656056ba4b3e792ab3334d38273ca11"
@@ -13173,14 +13143,6 @@ uglify-js@^3.1.4:
     commander "~2.20.0"
     source-map "~0.6.1"
 
-uglify-js@~2.3:
-  version "2.3.6"
-  resolved "https://registry.yarnpkg.com/uglify-js/-/uglify-js-2.3.6.tgz#fa0984770b428b7a9b2a8058f46355d14fef211a"
-  dependencies:
-    async "~0.2.6"
-    optimist "~0.3.5"
-    source-map "~0.1.7"
-
 uglify-to-browserify@~1.0.0:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/uglify-to-browserify/-/uglify-to-browserify-1.0.2.tgz#6e0924d6bda6b5afe349e39a6d632850a0f882b7"
@@ -13840,14 +13802,16 @@ xmlbuilder@~9.0.1:
   version "9.0.7"
   resolved "https://registry.yarnpkg.com/xmlbuilder/-/xmlbuilder-9.0.7.tgz#132ee63d2ec5565c557e20f4c22df9aca686b10d"
 
-xmldom@^0.1.19:
-  version "0.1.27"
-  resolved "https://registry.yarnpkg.com/xmldom/-/xmldom-0.1.27.tgz#d501f97b3bdb403af8ef9ecc20573187aadac0e9"
-
 "xtend@>=4.0.0 <4.1.0-0", xtend@^4.0.0, xtend@~4.0.1:
   version "4.0.2"
   resolved "https://registry.yarnpkg.com/xtend/-/xtend-4.0.2.tgz#bb72779f5fa465186b1f438f674fa347fdb5db54"
 
+xxhashjs@~0.2.2:
+  version "0.2.2"
+  resolved "https://registry.yarnpkg.com/xxhashjs/-/xxhashjs-0.2.2.tgz#8a6251567621a1c46a5ae204da0249c7f8caa9d8"
+  dependencies:
+    cuint "^0.2.2"
+
 y18n@^3.2.0, y18n@^3.2.1:
   version "3.2.1"
   resolved "https://registry.yarnpkg.com/y18n/-/y18n-3.2.1.tgz#6d15fba884c08679c0d77e88e7759e811e07fa41"