chore(package): update typedoc to version 0.15.3

Closes #6

Author: greenkeeper[bot]

package.json

@@ -105,7 +105,7 @@
     "tslint": "^5.8.0",
     "tslint-config-prettier": "^1.1.0",
     "tslint-config-standard": "^7.0.0",
-    "typedoc": "^0.11.0",
+    "typedoc": "^0.15.3",
     "typescript": "^2.6.2",
     "validate-commit-msg": "^2.12.2"
   },