chore(deps): update dependency cucumber to v6

Author: renovate-bot

package.json

@@ -46,13 +46,13 @@
   "devDependencies": {
     "@types/chai": "4.1.2",
     "@types/chai-http": "3.0.4",
-    "@types/cucumber": "3.2.2",
+    "@types/cucumber": "6.0.0",
     "@types/express": "4.11.1",
     "@types/node": "9.4.6",
     "chai": "4.1.2",
     "chai-http": "3.0.0",
     "coveralls": "3.0.0",
-    "cucumber": "3.2.1",
+    "cucumber": "6.0.4",
     "cucumber-html-reporter": "4.0.1",
     "express": "4.16.2",
     "nyc": "11.4.1",