Raise an error when attempting to merge an Array from mergedProperties
[BUGFIX release] Enable testing of production builds.

Update the build process to emit `ember-testing.js` which contains the
`ember-debug` and `ember-testing` packages.  This file can be include
when running tests against production builds of Ember (`ember.prod.js`).
[BUGFIX beta] Fix isEmpty for map
Merge pull request #9414 from mixonic/isEmpty-map

[BUGFIX beta] Fix isEmpty for map
Merge pull request #9411 from rwjblue/emit-ember-testing

[BUGFIX release] Enable testing of production builds.
Merge pull request #9401 from BookingSync/warn-route-queryparams-array

Raise an error when attempting to merge an Array from mergedProperties
[DOC] Fix Handlebars `input` Helper Doc Rendering
Merge pull request #9398 from jherdman/fix-handlebars-input-helper-docs

[DOC] Fix Handlebars `input` Helper Doc Rendering
[BUGFIX beta] Ensure production builds do not use require internally.
Merge pull request #9415 from rwjblue/derequire

[BUGFIX beta] Ensure production builds do not use require internally.
Finalize CHANGELOG for 1.8.0.
Post release version bump.
Remove outdated model documentation.
Merge pull request #5599 from gordonkristan/master

Remove outdated model documentation
[BUGFIX] Route query params configured by property name
Add API to get a view's client rects
Merge pull request #9400 from BookingSync/normalize-route-queryparams

Route query params configured by property name
[BUGFIX release] Throws an assertion if `classNameBindings` are specified on a tag-less view

Fixes #9418
[BUGFIX release] attributeBinding on class triggers assertion.

Using `attributeBinding: ['class']` will render your view unable to
handle DOM events (`EventDispatcher` uses `.ember-view` class for
events), `classNameBindings` is the more appropriate place to do this.
Merge pull request #9420 from twokul/assert-tagless-view

[BUGFIX release] Throws an assertion if `classNameBindings` are specified on a tag-less view