Update GitHub Actions

Author: mdmintz

.github/workflows/python-package.yml

@@ -14,9 +14,9 @@ jobs:
     runs-on: ubuntu-18.04
     strategy:
       fail-fast: false
-      max-parallel: 7
+      max-parallel: 6
       matrix:
-        python-version: ["2.7", "3.5", "3.6", "3.7", "3.8", "3.9", "3.10"]
+        python-version: ["2.7", "3.6", "3.7", "3.8", "3.9", "3.10"]
 
     steps:
     - uses: actions/checkout@v1