Migrate master branch to main

Author: Ph0tonic

.github/workflows/ci.yml

@@ -3,7 +3,7 @@ name: CI
 on:
   push:
     branches:
-      - master
+      - main
   pull_request:
 
 jobs:
@@ -80,7 +80,7 @@ jobs:
         run: |
           git config --global user.email "[email protected]"
           git config --global user.name "John Doe"
-          git config --global init.defaultBranch master # TODO: use main, need to adjust tests to match
+          git config --global init.defaultBranch main # TODO: use main, need to adjust tests to match
 
       - name: Run tests
         run: phpunit