chore(package): update @types/node to version 14.0.6

Closes #80

Author: greenkeeper[bot]

package.json

@@ -35,7 +35,7 @@
     "url": "https://github.com/raml-org/raml-definition-system/issues"
   },
   "devDependencies": {
-    "@types/node": "^13.9.0",
+    "@types/node": "^14.0.6",
     "@types/underscore": "^1.9.3",
     "dev-env-installer": "0.0.14",
     "json-loader": "0.5.7",