chore(package): update concurrently to version 3.6.1

Closes #247

Author: greenkeeper[bot]

package.json

@@ -142,7 +142,7 @@
     "browserstack-local": "1.2.0",
     "chai": "4.1.0",
     "chromedriver": "2.29.2",
-    "concurrently": "3.5.0",
+    "concurrently": "3.6.1",
     "coveralls": "2.13.1",
     "enzyme": "2.9.1",
     "eslint": "3.6.0",