Test on Python 3.10 final (#80)

Author: elprans

.github/workflows/tests.yml

@@ -14,7 +14,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        python-version: [3.6, 3.7, 3.8, 3.9, 3.10.0-rc.1]
+        python-version: ["3.6", "3.7", "3.8", "3.9", "3.10"]
         os: [windows-latest, ubuntu-latest, macos-latest]
         arch: [x64, x86]
         exclude: