v4.0.0

<a name"4.0.0">

4.0.0 (2018-10-15)

Features

• change error comparison algorithm again (#59) (50f229d5)
• change error comparison algorithm (#57) (62e2d514)

Breaking Changes

• As described in GH Issue #58, the previous change
  to the error comparison algorithm isn't compatible with IE and
  Safari due to those browsers adding extra enumerable properties
  onto Error objects. This commit causes Error objects to only
  include their name, message, and code properties in the
  comparison, regardless of enumerability.
  (50f229d5)

• This commit drops support for versions of Node
  that are no longer maintained.

• feat: change error comparison algorithm

BREAKING CHANGE: Previously, Error objects were compared using
strict equality. This commit causes Error objects to be compared
using deep equality instead, but treats them as a special case by
including their name and message properties in the comparison,
regardless of enumerability.

(62e2d514)