remove python 3.7 from ci as it's no longer supported

Author: DetachHead

.github/workflows/check.yaml

@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ["3.7", "3.8", "3.9", "3.10", "3.11-dev"]
+        python-version: ["3.8", "3.9", "3.10", "3.11-dev"]
 
     steps:
       - uses: actions/checkout@v2