add dependabot

.github/dependabot.yml

@@ -0,0 +1,20 @@
+# Documentation for all configuration options:
+# https://help.github.com/github/administering-a-repository/configuration-options-for-dependency-updates
+
+version: 2
+updates:
+  # Updates for Github Actions used in the repo
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "weekly"
+    reviewers:
+      - "esafirm"
+  # Updates for Gradle dependencies used in the app
+  - package-ecosystem: gradle
+    directory: "/"
+    schedule:
+      interval: "weekly"
+    open-pull-requests-limit: 10
+    reviewers:
+      - "esafirm"