Prepare for a release supporting Python 3.12 (#271)

Author: oittaa

setup.py

@@ -46,10 +46,11 @@
         "Operating System :: OS Independent",
         "Programming Language :: Python",
         "Programming Language :: Python :: 3",
-        "Programming Language :: Python :: 3.7",
         "Programming Language :: Python :: 3.8",
         "Programming Language :: Python :: 3.9",
         "Programming Language :: Python :: 3.10",
+        "Programming Language :: Python :: 3.11",
+        "Programming Language :: Python :: 3.12",
     ],
     entry_points={
         "console_scripts": [
@@ -60,5 +61,5 @@
         "fs",
         "google-crc32c",
     ],
-    python_requires=">=3.7",
+    python_requires=">=3.8",
 )