Update v4.0.0 in CHANGELOG.md.

CHANGELOG.md

@@ -1,19 +1,27 @@
 # Change Log
 
-## v4.0.0 (2018-10-19)
+## v4.0.0 (2018-10-30)
 
 #### :boom: Breaking Change
 * [#348](https://github.com/emberjs/ember-qunit/pull/348) Bump ember-cli-babel from 6.17.2 to 7.1.2 ([@dependabot[bot]](https://github.com/apps/dependabot))
 * [#354](https://github.com/emberjs/ember-qunit/pull/354) Drop support for Node.js 4 and below ([@Turbo87](https://github.com/Turbo87))
 
+#### :rocket: Enhancement
+* [#373](https://github.com/emberjs/ember-qunit/pull/373) Adding debug info to test isolation validation ([@scalvert](https://github.com/scalvert))
+
 #### :bug: Bug Fix
 * [#369](https://github.com/emberjs/ember-qunit/pull/369) Upgrade qunit to v2.7.1 ([@stefanpenner](https://github.com/stefanpenner))
 
 #### :house: Internal
 * [#358](https://github.com/emberjs/ember-qunit/pull/358) Remove obsolete dependency resolution overrides ([@Turbo87](https://github.com/Turbo87))
 
-#### Committers: 2
+#### :memo: Documentation
+* [#371](https://github.com/emberjs/ember-qunit/pull/371) README: Add "Requirements" section ([@Turbo87](https://github.com/Turbo87))
+
+#### Committers: 4
 - Stefan Penner ([@stefanpenner](https://github.com/stefanpenner))
+- Robert Jackson ([@rwjblue](https://github.com/rwjblue))
+- Steve Calvert ([@scalvert](https://github.com/scalvert))
 - Tobias Bieniek ([@Turbo87](https://github.com/Turbo87))