Suggestions from sp-repo-review for Github actions

Author: takluyver

.github/dependabot.yml

@@ -0,0 +1,7 @@
+version: 2
+updates:
+# Maintain dependencies for GitHub Actions
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "weekly"

.github/workflows/test.yml

@@ -6,6 +6,11 @@ on:
     tags: [ '*' ]
   pull_request:
     branches: [ main ]
+  workflow_dispatch:
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
 
 jobs:
   tests: