Update minimum Python version & relevant list identifiers

Author: sadielbartholomew

setup.py

@@ -294,10 +294,11 @@ def compile():
         "Operating System :: MacOS",
         "Programming Language :: Python :: 3",
         "Programming Language :: Python :: 3 :: Only",
-        "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",
     ],
     packages=[
         "cf",
@@ -321,7 +322,7 @@ def compile():
     ],
     package_data={"cf": package_data},
     scripts=["scripts/cfa"],
-    python_requires=">=3.7",
+    python_requires=">=3.8",
     install_requires=install_requires,
     tests_require=tests_require,
     extras_require=extras_require,