fix: upgrade documentation from 12.0.0 to 12.1.4 (#407)

Snyk has created this PR to upgrade documentation from 12.0.0 to 12.1.4.

See this package in NPM:
https://www.npmjs.com/package/documentation

See this project in Snyk:
https://app.snyk.io/org/nodeshift-agg/project/0569fa2f-39b2-4a6a-9bdc-8ac878d28a88?utm_source=github&utm_medium=upgrade-pr

package.json

@@ -55,7 +55,7 @@
     "babel-loader": "^8.0.6",
     "codacy-coverage": "^3.4.0",
     "coveralls": "^3.0.3",
-    "documentation": "^12.0.0",
+    "documentation": "^12.1.4",
     "nyc": "~15.0.0",
     "opener": "1.5.1",
     "serve": "^11.0.0",