add dependabot config (#60)

add dependabot config

This configures Dependabot to:
Keep npm and GitHub Actions dependencies up-to-date.
Automatically create pull requests for updates.
Limit npm updates to 10 open pull requests at a time.

Reviewed-by: Vladimir Hasko <[email protected]>

.github/dependabot.yml

@@ -0,0 +1,17 @@
+# 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/code-security/dependabot/dependabot-version-updates/configuration-options-for-the-dependabot.yml-file
+
+version: 2
+updates:
+  - package-ecosystem: "npm"
+    directory: "/"
+    open-pull-requests-limit: 10
+    schedule:
+      interval: "weekly"
+
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "weekly"