Let dependabot also check github-actions and pre-commit. (#120)

Author: marcfehling

.github/dependabot.yml

@@ -5,7 +5,17 @@
 
 version: 2
 updates:
-  - package-ecosystem: npm
-    directory: "/" # Location of package manifests
+  - package-ecosystem: "npm"
+    directory: "/"
+    schedule:
+      interval: "weekly"
+
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "weekly"
+
+  - package-ecosystem: "pre-commit"
+    directory: "/"
     schedule:
       interval: "weekly"