• Include eslint-plugin-babel for the babel/object-curly-spacing rule

• Enforcing consistent spacing in object curly braces

• Prevent accidentally writing to global variables when not intending to

  

• expand definition of quote rule to follow https://github.com/elastic/kibana/blob/master/style_guides/js_style_guide.md#use-template-strings-to-avoid-escaping-single-quotes

Breaking changes

#1: Disallow unused vars.