docs: update changelog

Author: Donaldcwl

CHANGELOG.md

@@ -1,5 +1,6 @@
 ## v2.0.0 (13 Apr 2022)
-* docs: add CSS animation to example html for showing main thread status
+* feature: example html - added CSS animation for showing main thread status
+* feature: example html - added version switch
 * feature: support AbortController (abort / cancel during compression) [#101](https://github.com/Donaldcwl/browser-image-compression/issues/101)
 * feature: options.alwaysKeepResolution (default: false) - keep the resolution (width and height) during compression and reduce the quality only (note that options.maxWidthOrHeight is still applied if set) [#127](https://github.com/Donaldcwl/browser-image-compression/issues/127)
 * fixed: Main thread is blocked on Mac device for options.useWebWorker=true [#139](https://github.com/Donaldcwl/browser-image-compression/issues/139)