chore(deps): update dependency typedoc to v0.28.0

Author: renovate[bot]

package.json

@@ -62,7 +62,7 @@
     "tslint": "5.16.0",
     "tslint-config-prettier": "1.18.0",
     "tslint-immutable": "5.5.2",
-    "typedoc": "0.14.2",
+    "typedoc": "0.28.0",
     "typedoc-plugin-markdown": "1.2.0"
   },
   "config": {