`skpm init <template>` not preserving dependencies
Ran

````
$ skpm init git+ssh://git@github.com:jongold/react-sketchapp-skpm-example.git
....
$ yarn
````

`package.json` is as follows:
````json
{
	"name": "test-skpm-init",
	"version": "1.0.0",
	"main": "plugin.sketchplugin",
	"scripts": {
		"test": "echo \"Error: no test specified\" && exit 1",
		"build": "skpm build",
		"watch": "skpm build --watch",
		"link": "skpm link",
		"publish": "skpm publish"
	},
	"author": "",
	"license": "ISC",
	"description": "",
	"manifest": "src/manifest.json",
	"devDependencies": {
		"babel-preset-es2015": "^6.22.0",
		"babel-preset-react": "^6.22.0",
		"eslint": "^3.17.1",
		"eslint-config-airbnb": "^14.1.0",
		"eslint-plugin-import": "^2.2.0",
		"eslint-plugin-jsx-a11y": "^4.0.0",
		"eslint-plugin-react": "^6.10.0",
		"skpm": "^0.5.0"
	}
}
````

Would be much nicer if they were preserved deps so it works out of the box:

https://github.com/jongold/react-sketchapp-skpm-example/blob/master/package.json