ci(dependencies.io): add dependencies.yml config

dependencies.yml

@@ -0,0 +1,13 @@
+collectors:
+
+- type: php-composer
+  path: /
+  actors:
+  # pull requests for updates to our major version
+  - type: php-composer
+    versions: "L.Y.Y"
+  # create issues for new major versions
+  - type: repo-issue
+    versions: "Y.0.0"
+    settings:
+      commit_message_prefix: "chore: "