housekeeping: move traverse to production dependencies (via #1443)

Author: shockey

package-lock.json

@@ -82,7 +82,6 @@
     "nock": "^10.0.6",
     "npm-run-all": "^4.1.3",
     "release-it": "^7.4.8",
-    "traverse": "^0.6.6",
     "webpack": "^3.11.0",
     "webpack-bundle-size-analyzer": "^2.2.0",
     "xmock": "^0.3.0"
@@ -102,6 +101,7 @@
     "lodash": "^4.16.2",
     "qs": "^6.3.0",
     "querystring-browser": "^1.0.4",
+    "traverse": "^0.6.6",
     "url": "^0.11.0",
     "utf8-bytes": "0.0.1",
     "utfstring": "^2.0.0"