chore(package): update cross-spawn to version 7.0.3

Closes #144

Author: greenkeeper[bot]

package.json

@@ -78,7 +78,7 @@
     "concurrently": "^4.0.0",
     "copy-webpack-plugin": "^4.0.1",
     "cross-env": "^5.1.4",
-    "cross-spawn": "^6.0.5",
+    "cross-spawn": "^7.0.3",
     "css-loader": "^1.0.0",
     "devtron": "^1.4.0",
     "electron": "^3.0.0",