use is-equal instead of deeper for es6 set and map support

[mayankchd]

No description provided.

[mayankchd]

Failing on Node.js 0.10 as it doesn't support Set and Map

[jamestalmage]

For Node 0.10, lookup how Set and Map are referenced when transformed by Babel, should be something like:

var Map = require('babel-runtime/lib/fn/Map');
// or 
var Map = require('core-js/lib/fn/Map');

[sindresorhus]

I would prefer to just add support for Map/Set in deeper. is-equal brings in 2.3 MB of dependencies.

[sindresorhus]

Closing in favor of othiym23/node-deeper#2.

[jamestalmage]

👍 I agree. 2.3MB is just way to big. AVA already takes just this side of eternity to download. @twada and others have put in major effort slimming down their packages and our download size. This would be a major step in the wrong direction.

Sorry @mayankchd. Otherwise your PR looked great. It's not your fault that package is so bloated.

[mayankchd]

Thanks! I like ava a lot!