dependabot: switch to grouped updates (#1977)

.github/dependabot.yml

@@ -4,9 +4,12 @@ updates:
     directory: "/"
     schedule:
       interval: monthly
+    labels:
+      - dependencies
+      - github_actions
     reviewers:
       - XhmikosR
-  - package-ecosystem: npm
+  - package-ecosystem: "npm"
     directory: "/"
     schedule:
       interval: monthly
@@ -15,3 +18,8 @@ updates:
     reviewers:
       - XhmikosR
     versioning-strategy: increase
+    groups:
+      production-dependencies:
+        dependency-type: "production"
+      development-dependencies:
+        dependency-type: "development"