Update CI configuration and trove classifiers.

Author: vsajip

.github/workflows/tests.yml

@@ -70,8 +70,8 @@ jobs:
         coverage xml
     - name: Upload coverage to Codecov
       # Repeated failures of Codecov on macos-12
-      if: ${{ matrix.os != 'macos-12' }}
-      uses: codecov/codecov-action@v3
+      # if: ${{ matrix.os != 'macos-12' }}
+      uses: codecov/codecov-action@v4
       with:
         flags: unittests
         files: coverage.xml

setup.cfg

@@ -37,6 +37,7 @@ classifiers =
     Programming Language :: Python :: 3.9
     Programming Language :: Python :: 3.10
     Programming Language :: Python :: 3.11
+    Programming Language :: Python :: 3.12
     Operating System :: OS Independent
     Topic :: Software Development :: Libraries :: Python Modules"
 project_urls =