no failing fast

Author: SkafteNicki

.github/workflows/tests.yml

@@ -11,6 +11,7 @@ jobs:
 
     runs-on: ${{ matrix.os }}
     strategy:
+      fail-fast: false
       matrix:
         os: [ubuntu-20.04, macOS-10.15, windows-2019]
         python-version: [3.6, 3.7, 3.8, 3.9]