modify python-test.yml, delete 3.7 because networkx>=2.8.5 requires p…

…ython>=3.8

.github/workflows/python-test.yml

@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: [3.7, 3.8, 3.9, '3.10']
+        python-version: [3.8, 3.9, '3.10']  # 3.7, 
 
     steps:
       - uses: actions/checkout@v2