Merge pull request #96 from predict-idlab/add_python3dot10

🙃  add python3.10 (as string)

Author: jvdd

.github/workflows/test.yml

@@ -17,7 +17,7 @@ jobs:
       fail-fast: false
       matrix:
         os: ['windows-latest', 'macOS-latest', 'ubuntu-latest']
-        python-version: [3.7, 3.8, 3.9, 3.10]
+        python-version: ['3.7', '3.8', '3.9', '3.10']
 
     steps:
     - uses: actions/checkout@v2