Update dependency del to ^2.2.2

Author: mend-5034428[bot]

package.json

@@ -14,7 +14,7 @@
     "popsicle": "^2.0.1"
   },
   "devDependencies": {
-    "del": "^2.2.0",
+    "del": "^2.2.2",
     "gulp": "^3.9.0",
     "gulp-eslint": "^1.1.1",
     "gulp-mocha": "^2.2.0",