Merge pull request #5 from timkpaine/timkpaine-patch-1

Reduce CI

Author: timkpaine

.github/workflows/build.yml

@@ -2,6 +2,8 @@ name: Build Status
 
 on:
   push:
+    branches:
+       - main
   pull_request:
   schedule:
     # run on sunday nights
@@ -13,7 +15,7 @@ jobs:
 
     strategy:
       matrix:
-        python-version: [3.6, 3.7, 3.8]
+        python-version: [3.9]
 
     steps:
     - uses: actions/checkout@v2