Group Dependabot updates (#45)

Author: samdark

.github/dependabot.yml

@@ -4,13 +4,25 @@ updates:
   - package-ecosystem: "github-actions"
     directory: "/"
     schedule:
-      interval: "daily"
-    # Too noisy. See https://github.community/t/increase-if-necessary-for-github-actions-in-dependabot/179581
-    open-pull-requests-limit: 0
+      interval: "weekly"
+    cooldown:
+      default-days: 7
+    groups:
+      github-actions:
+        patterns:
+          - "*"
+    ignore:
+      - dependency-name: "yiisoft/*"
 
   # Maintain dependencies for Composer
   - package-ecosystem: "composer"
     directory: "/"
     schedule:
       interval: "daily"
+    cooldown:
+      default-days: 7
+    groups:
+      composer-dependencies:
+        patterns:
+          - "*"
     versioning-strategy: increase-if-necessary