Simplify GitHub Actions workflow configs so they run on any push or PR instead of only ones to specific branches

I like getting to see the output of CI tools while I develop on a branch and suspect that will be handy for others as well.

Author: tleonhardt

.github/workflows/ci.yml

@@ -2,15 +2,7 @@
 # https://docs.github.com/en/actions/reference/workflow-syntax-for-github-actions
 name: CI
 
-on:
-  push:
-    branches:
-      - master
-      - 2.0
-  pull_request:
-    branches:
-      - master
-      - 2.0
+on: [push, pull_request]
 
 env:
   PYTHON_LATEST: 3.9

.github/workflows/doc.yml

@@ -2,15 +2,7 @@
 # https://docs.github.com/en/actions/reference/workflow-syntax-for-github-actions
 name: Doc
 
-on:
-  push:
-    branches:
-      - master
-      - 2.0
-  pull_request:
-    branches:
-      - master
-      - 2.0
+on: [push, pull_request]
 
 env:
   PYTHON_LATEST: 3.9

.github/workflows/lint.yml

@@ -2,15 +2,7 @@
 # https://docs.github.com/en/actions/reference/workflow-syntax-for-github-actions
 name: Lint
 
-on:
-  push:
-    branches:
-      - master
-      - 2.0
-  pull_request:
-    branches:
-      - master
-      - 2.0
+on: [push, pull_request]
 
 env:
   PYTHON_LATEST: 3.9