Run tests on V3 branch

.github/workflows/pypi.yml

@@ -3,8 +3,11 @@ on:
   push:
     branches:
       - main
+      - v3
   pull_request:
-    branches: [main]
+    branches:
+      - main
+      - v3
   release:
     types: [published]
 

.github/workflows/test.yml

@@ -4,9 +4,11 @@ on:
   push:
     branches:
       - main
+      - v3
   pull_request:
     branches:
       - main
+      - v3
 
 # Cancels all previous workflow runs for pull requests that have not completed.
 concurrency: