chore(package): update typedoc-plugin-external-module-name to version 2.2.1

Closes #91

Author: greenkeeper[bot]

package.json

@@ -60,7 +60,7 @@
     "nyc": "11.8.0",
     "swagger-tools": "0.10.4",
     "typedoc": "^0.12.0",
-    "typedoc-plugin-external-module-name": "^1.1.1",
+    "typedoc-plugin-external-module-name": "^2.2.1",
     "v8-profiler": "5.7.0"
   },
   "scripts": {