Add dependencies.yml for dependencies.io

dependencies.yml

@@ -0,0 +1,15 @@
+collectors:
+
+- type: dockerfile
+  path: Dockerfile
+  actors:
+  # pull requests for all major, minor, and patch updates
+  - type: find-replace
+    versions: "L.Y.Y"
+
+- type: php-composer
+  path: /
+  actors:
+  # pull requests for all major, minor, and patch updates
+  - type: php-composer
+    versions: "Y.Y.Y"