Drop 3.7

Author: ifd3f

.github/workflows/CI.yaml

@@ -19,10 +19,10 @@ jobs:
     name: Test on py${{ matrix.python-version }}/${{ matrix.os }}
     runs-on: ${{ matrix.os }}
     strategy:
-      fail-fast: true
+      fail-fast: false
       matrix:
         os: [macOS-latest, ubuntu-latest]
-        python-version: [3.7, 3.8, 3.9]
+        python-version: ["3.8", "3.9"]
 
     steps:
     - uses: actions/checkout@v2