Fix 3.10 version thanks to github behaviours

Author: timsavage

.github/workflows/python-package.yml

@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: [3.8, 3.9, 3.10]
+        python-version: [3.8, 3.9, '3.10']
 
     steps:
     - uses: actions/checkout@v2