fix(package): update jsonwebtoken to version 8.2.2

Closes #191

Author: greenkeeper[bot]

package.json

@@ -44,7 +44,7 @@
     "express": "^4.14.0",
     "is-image": "^1.0.1",
     "jsonschema": "^1.1.1",
-    "jsonwebtoken": "^7.2.1",
+    "jsonwebtoken": "^8.2.2",
     "mcs-lite-admin-web": "^0.2.0",
     "mcs-lite-introduction": "^0.2.9",
     "mcs-lite-mobile-web": "^0.4.13",