@birchill/json-equalish

A simplified version of deep-equal intended for comparing objects that are being
serialized to/from JSON that:

1. Treats undefined as null as different
(since they produce different JSON output)

2. Treats a missing property and an undefined property as equal
(since they produce the same JSON output)

3. Only deals with POD for now since that's typically what you serialize and
trying to deal other types like deep-equal does can lead to lots of unwanted
dependencies.

e.g. deep-equal has the following dependency chain:

deep-equal -> is-regex -> has -> function-bind

and function-bind does eval() (actually Function()) which causes
problems for CSP.

Furthermore, this library is mostly tailored towards using browser APIs that are
commonly available. It uses Object.is which IE doesn't support but none of our
projects care about supporting IE.

In fact, if you're reading this, you probably shouldn't use it. It's basically
just trying to compare the result of JSON.stringify() on two objects but
allowing the order of keys to differ.