chore(package): update shortid to 2.2.14 from 2.2.6

quickly tested

closes #449

package.json

@@ -52,7 +52,7 @@
     "increase-memory-limit": "^1.0.6",
     "jszip": "^3.0.0",
     "loglevel": "^1.5.0",
-    "shortid": "^2.2.6",
+    "shortid": "^2.2.14",
     "typescript-collections": "^1.1.2",
     "vexflow": "^1.2.87"
   },