ADD concurrently

package.json

@@ -21,7 +21,7 @@
     "raleway-webfont": "^3.0.1",
     "roboto-fontface": "^0.7.0",
     "source-sans-pro": "^2.0.10",
-    "text-fitter": "^1.0.0",
+    "text-fitter": "^1.0.1",
     "vue": "^2.3.4",
     "vue-router": "^2.3.1"
   },
@@ -39,6 +39,7 @@
     "chai": "^4.0.2",
     "chalk": "^1.1.3",
     "chromedriver": "^2.30.1",
+    "concurrently": "^3.4.0",
     "connect-history-api-fallback": "^1.3.0",
     "copy-webpack-plugin": "^4.0.1",
     "cpx": "^1.5.0",