Include Actions in dependabot.yml (#3058)

.github/dependabot.yml

@@ -1,11 +1,21 @@
-# To get started with Dependabot version updates, you'll need to specify which
-# package ecosystems to update and where the package manifests are located.
-# Please see the documentation for all configuration options:
-# https://docs.github.com/github/administering-a-repository/configuration-options-for-dependency-updates
-
 version: 2
 updates:
-  - package-ecosystem: "composer" # See documentation for possible values
-    directory: "/web/inc/" # Location of package manifests
+
+  # Maintain dependencies for GitHub Actions
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "weekly"
+
+  # Maintain dependencies for npm
+  # TODO: Enable this when we build JS and have no checked-in minified JS/CSS
+  # - package-ecosystem: "npm"
+  #   directory: "/web"
+  #   schedule:
+  #     interval: "weekly"
+
+  # Maintain dependencies for Composer
+  - package-ecosystem: "composer"
+    directory: "/web/inc" # Location of package manifests
     schedule:
       interval: "weekly"