workflows: Test on 3.10 final

Author: elprans

.github/workflows/tests.yml

@@ -14,7 +14,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        python-version: [3.5, 3.6, 3.7, 3.8, 3.9, 3.10.0-rc.1]
+        python-version: ["3.5", "3.6", "3.7", "3.8", "3.9", "3.10"]
         os: [windows-latest, ubuntu-latest, macos-latest]
         exclude:
           # Python 3.5 is unable to properly