Update dependency @types/node to ~6.14.0

Author: renovate[bot]

package.json

@@ -51,7 +51,7 @@
     "@types/fabric": "file:./fabric-types",
     "@types/file-saver": "^1.3.0",
     "@types/hammerjs": "^2.0.35",
-    "@types/node": "~6.0.60",
+    "@types/node": "~6.14.0",
     "@types/svg4everybody": "^2.1.0",
     "@types/webfontloader": "^1.6.29",
     "codelyzer": "^4.0.1",