ci: Setup dependabot

Signed-off-by: provokateurin <kate@provokateurin.de>

Author: provokateurin

.github/dependabot.yml

@@ -0,0 +1,24 @@
+version: 2
+updates:
+  - package-ecosystem: composer
+    directory: "/"
+    commit-message:
+      prefix: "chore"
+      include: "scope"
+    versioning-strategy: "increase"
+    schedule:
+      interval: weekly
+      day: saturday
+      time: "03:00"
+      timezone: Europe/Berlin
+  - package-ecosystem: npm
+    directory: "/"
+    commit-message:
+      prefix: "chore"
+      include: "scope"
+    versioning-strategy: "increase"
+    schedule:
+      interval: weekly
+      day: saturday
+      time: "03:00"
+      timezone: Europe/Berlin