Create dependabot.yml (#12)

* Create dependabot.yml

* Update dependabot.yml

Author: tjorim

.github/dependabot.yml

@@ -0,0 +1,18 @@
+version: 2
+updates:
+  - package-ecosystem: "devcontainers"
+    directory: "/"
+    labels:
+      - "pr: dependency-update"
+    schedule:
+      interval: weekly
+      time: "06:00"
+    open-pull-requests-limit: 10
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    labels:
+      - "pr: dependency-update"
+    schedule:
+      interval: weekly
+      time: "06:00"
+    open-pull-requests-limit: 10