It does not work with node10

Signed-off-by: Jean-Laurent de Morlhon <jeanlaurent@morlhon.net>

CONTRIBUTING.md

@@ -20,7 +20,7 @@ Before you file an issue or a pull request, read the following tips on how to ke
 ### Prerequisites for developing Kitematic on Mac
 You will need to install:
 - The [Docker Toolbox](https://docker.com/toolbox)
-- [Node.js](https://nodejs.org/)
+- [Node.js](https://nodejs.org/) node version 10 is not supported
 - Wine `brew install wine` (only if you want to generate a Windows release on OS X)
 - The latest Xcode from the Apple App Store.
 

package.json

@@ -11,6 +11,9 @@
     "url": "git@github.com:kitematic/kitematic.git"
   },
   "bugs": "https://github.com/kitematic/kitematic/issues",
+  "engines": {
+    "node": "<10.0.0"
+  },
   "scripts": {
     "build": "tsc && npm run tslint",
     "integration": "jest -c jest-integration.json",