Update jsonwebtoken to v8.2.1 (#231)

Author: laurenzlong

package.json

@@ -54,11 +54,11 @@
   "dependencies": {
     "@types/cors": "^2.8.1",
     "@types/express": "^4.11.1",
-    "@types/jsonwebtoken": "^7.1.32",
+    "@types/jsonwebtoken": "^7.2.6",
     "@types/lodash": "^4.14.34",
     "cors": "^2.8.4",
     "express": "^4.16.2",
-    "jsonwebtoken": "^7.1.9",
+    "jsonwebtoken": "^8.2.1",
     "lodash": "^4.6.1"
   },
   "engines": {