📦 Reuse dependabot config from graphqlite-bundle (update GH actions and composer fully)

Author: andrew-demb

.github/dependabot.yaml

@@ -0,0 +1,15 @@
+version: 2
+updates:
+    - package-ecosystem: github-actions
+      directory: '/'
+      schedule:
+          interval: weekly
+      pull-request-branch-name:
+          separator: '-'
+    - package-ecosystem: composer
+      directory: '/'
+      versioning-strategy: widen
+      schedule:
+          interval: weekly
+      pull-request-branch-name:
+          separator: '-'