chore(package): update concurrently to version 5.2.0

Closes #105

Author: greenkeeper[bot]

package.json

@@ -126,7 +126,7 @@
     "@types/sinon": "^4.0.0",
     "asar": "^0.14.0",
     "boiler-room-custodian": "^0.6.2",
-    "concurrently": "^3.1.0",
+    "concurrently": "^5.2.0",
     "cross-env": "^5.0.1",
     "css-loader": "^0.28.4",
     "css-modules-require-hook": "^4.0.6",