fixed #55: Renovate: recognize docker-compose files in "docker-compose" subdirectory

renovate.json

@@ -3,5 +3,8 @@
   "extends": [
     "config:base"
   ],
-  "labels": ["renovate"]
+  "labels": ["renovate"],
+  "docker-compose": {
+    "fileMatch": [ "docker\\-compose\\/(\\w|\\-|\\.)*\\.yml" ]
+  }
 }