only test on 3.7 for now

Author: DomAmato

.github/workflows/testlint.yml

@@ -8,7 +8,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: [3.7, 3.8]
+        python-version: [3.7]
 
     steps:
     - uses: actions/checkout@v2