Update branch names in workflows

Author: brandonwillard

.github/workflows/pypi.yml

@@ -2,10 +2,10 @@ name: PyPI
 on:
   push:
     branches:
-      - master
+      - main
       - auto-release
   pull_request:
-    branches: [master]
+    branches: [main]
   release:
     types: [published]
 

.github/workflows/tests.yml

@@ -3,10 +3,10 @@ name: Tests
 on:
   push:
     branches:
-      - master
+      - main
   pull_request:
     branches:
-      - master
+      - main
 
 jobs:
   changes:

Makefile

@@ -64,7 +64,7 @@ benchmark:
 	pytest -v tests/ --benchmark-only --benchmark-autosave --benchmark-group-by=group,param:size --benchmark-max-time=3
 
 coverage: test
-	diff-cover coverage.xml --compare-branch=master --fail-under=100
+	diff-cover coverage.xml --compare-branch=main --fail-under=100
 
 pypi:
 	${PYTHON} setup.py clean --all; \