chore(package): update @types/jsonwebtoken to version 8.3.4

Closes #180

Author: greenkeeper[bot]

package.json

@@ -156,7 +156,7 @@
     "@types/express": "4.16.1",
     "@types/jasmine": "3.3.12",
     "@types/jest": "24.0.12",
-    "@types/jsonwebtoken": "8.3.2",
+    "@types/jsonwebtoken": "8.3.4",
     "@types/node": "12.0.0",
     "@types/supertest": "2.0.7",
     "codelyzer": "5.0.1",