Add ESLint rule: quote-props (warning)
Add ESLint rule: quote-props (warning)

We only hit this warning it one place, but one of the keys is `'delete'`, so
which is a protected word, so I think it makes sense to leave it quoted.

zgl2007dj/backbone,akre54/backbone,jridgewell/backbone,craigmichaelmartin/backbone,lastjune/backbone,jridgewell/backbone,jashkenas/backbone,alekskorolev/lightbones,lastjune/backbone,moimikey/backbone,craigmichaelmartin/backbone,darrrk/backbone,platinumazure/backbone,ppker/backbone,alekskorolev/lightbones,zgl2007dj/backbone,platinumazure/backbone,darrrk/backbone,akre54/backbone,moimikey/backbone,ppker/backbone,jashkenas/backbone