chore: remove EoL Python 3.7 from test matrix

Author: Shu Shen

.github/workflows/pythonapp.yml

@@ -17,11 +17,11 @@ jobs:
   build:
 
     runs-on: ${{ matrix.os }}
-    strategy: 
+    strategy:
       max-parallel: 6
-      matrix : 
+      matrix :
         os: [ubuntu-latest, windows-latest, macos-latest]
-        python-version: ['3.7', '3.8', '3.9', '3.10']
+        python-version: ['3.8', '3.9', '3.10']
     steps:
     - uses: actions/checkout@v3
     - name: Set up Python ${{ matrix.python-version }}