Add CHANGELOG.md for v0.6.0.

Author: rwjblue

CHANGELOG.md

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+## v0.6.0 (2019-01-25)
+
+#### :boom: Breaking Change
+* [#20](https://github.com/emberjs/ember-jquery/pull/20) Drop Node 4 support ([@simonihmig](https://github.com/simonihmig))
+
+#### :rocket: Enhancement
+* [#27](https://github.com/emberjs/ember-jquery/pull/27) Add support for `Component.prototype.$()` to avoid the deprecation added as part of RFC386 ([@simonihmig](https://github.com/simonihmig))
+* [#33](https://github.com/emberjs/ember-jquery/pull/33) Add `jQuery` shim as part of RFC386 ([@simonihmig](https://github.com/simonihmig))
+
+#### :bug: Bug Fix
+* [#37](https://github.com/emberjs/ember-jquery/pull/37) Update `ember-cli-babel` to include support for skipping jQuery import transpilation ([@simonihmig](https://github.com/simonihmig))
+
+#### :memo: Documentation
+* [#7](https://github.com/emberjs/ember-jquery/pull/7) Add repo to package.json ([@ef4](https://github.com/ef4))
+
+#### Committers: 2
+- Edward Faulkner ([@ef4](https://github.com/ef4))
+- Simon Ihmig ([@simonihmig](https://github.com/simonihmig))
+
+
+## v0.5.2 (2018-06-07)
+
+#### :bug: Bug Fix
+* [#6](https://github.com/emberjs/ember-jquery/pull/6) Fix logic around warning instructing to remove @ember/jquery. ([@rwjblue](https://github.com/rwjblue))
+
+#### Committers: 1
+- Robert Jackson ([@rwjblue](https://github.com/rwjblue))
+
+
+## v0.5.1 (2018-05-23)
+
+#### :bug: Bug Fix
+* [#4](https://github.com/emberjs/ember-jquery/pull/4) Avoid double import of jQuery when ember-cli has already included it. ([@rwjblue](https://github.com/rwjblue))
+
+#### Committers: 1
+- Robert Jackson ([@rwjblue](https://github.com/rwjblue))