Memoize main export (#181)
Memoize main export (#181)

Chai protects against duplicate `use` calls, but this only occurs if the
plugin is the same each time. By providing a call-only interface,
chai-enzyme prevents Chai from de-duplicating.

Fixes: #180
See also: https://github.com/chaijs/chai/blob/30a44513f4f39fd8528b4527a32f674c1ea1b862/lib/chai.js#L38
producthunt/chai-enzyme