testing latest python versions (#162)

* testing latest python versions

* python 3.10 in quotes in CI

Author: vuillaut

.github/workflows/continuousintegration.yml

@@ -7,7 +7,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: [3.6, 3.7, 3.8]
+        python-version: [3.6, 3.7, 3.8, 3.9, "3.10"]
 
     steps:
     - uses: actions/checkout@v2