ci(github): add optional fields to dependabot.yml

Author: remarkablemark

.github/dependabot.yml

@@ -5,7 +5,16 @@
 
 version: 2
 updates:
-  - package-ecosystem: 'npm' # See documentation for possible values
-    directory: '/' # Location of package manifests
+  # Required
+  - package-ecosystem: 'npm'
+    directory: '/'
     schedule:
       interval: 'daily'
+
+    # Optional
+    assignees:
+      - 'remarkablemark'
+    labels:
+      - 'dependencies'
+    reviewers:
+      - 'remarkablemark'