Merge pull request #105 from adafruit/jepler-patch-1

pre-commit: run on all branches & on ubuntu-20.04

Author: tannewt

.github/workflows/pre-commit.yml

@@ -7,11 +7,10 @@ name: pre-commit
 on:
   pull_request:
   push:
-    branches: [master]
 
 jobs:
   pre-commit:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
     steps:
     - uses: actions/checkout@v1
     - uses: actions/setup-python@v1