adds release notes for v11.0.0

Author: rovolution

CHANGELOG.md

@@ -1,3 +1,10 @@
+11.0.0 / 2020-06-03
+==================
+* **Bootstrap 4 Compatibility:** We are now compatible with Bootstrap 4! Major thanks goes to [Jeffrey Espiritu](https://github.com/jespirit) and [David Lesieur](https://github.com/davidlesieur) for leading this effort!
+* Starting with this major release, all new changes will only be compatible with Bootstrap 4. **We will not support backwards compatibility with older versions of Bootstrap!**
+* **We (the maintainers) will no longer support the 10.x and older versions of this plugin!**
+* However we will still accept bug fix pull requests for this version. If you want to make a pull request against this version, please branch off the `bs3` branch of our repository and create your pull requests against that branch.
+
 10.6.2 / 2019-07-11
 ==================
 * **Bug Fix:** Fixes bridget bug with empty jquery object. [See here for further details](https://github.com/seiyria/bootstrap-slider/issues/916). Thanks to [ollycross](https://github.com/ollycross)

README.md

@@ -6,6 +6,8 @@ Over time, this project has diverged sigfinicantly from Stefan Petre's version a
 
 __Please ensure that you are using this library instead of the Petre version before creating issues in the repository issue tracker!!__
 
+__Starting with major release 11.0.0, we only support Bootstrap 4!__
+
 Installation
 ============
 Want to use bower? `bower install seiyria-bootstrap-slider`