entity: fix typo.

Idenfity => Identify
Merge pull request #323 from tcort/typo

entity: fix typo.
Release 1.1.8
1.1.9

* upgrade `analytics.js-integrations` to `0.2.16`
* add `search` to page property defaults
Merge remote-tracking branch 'origin/master' into add/facade
group properties => traits
track properties