Use Renovate (#276)

.github/dependabot.yml

@@ -1,12 +0,0 @@
-version: 2
-updates:
-- package-ecosystem: github-actions
-  directory: "/"
-  schedule:
-    interval: monthly
-  open-pull-requests-limit: 99
-- package-ecosystem: gradle
-  directory: "/"
-  schedule:
-    interval: monthly
-  open-pull-requests-limit: 99

renovate.json

@@ -0,0 +1,15 @@
+{
+  "$schema": "https://docs.renovatebot.com/renovate-schema.json",
+  "extends": [
+    "config:recommended",
+    "schedule:monthly"
+  ],
+  "configMigration": true,
+  "minimumReleaseAge": "7 days",
+  "addLabels": [
+    "renovate"
+  ],
+  "dependencyDashboardLabels": [
+    "renovate"
+  ]
+}