docs: updated CHANGELOG & README with web_callkit breaking changes

Author: cybex-dev

CHANGELOG.md

@@ -14,9 +14,9 @@
 * Docs: update CHANGELOG, README
 
 ## 0.3.0
-
+* BREAKING CHANGES:
+  * Feat: [Web] Add [web_callkit](https://pub.dev/packages/web_callkit) support. Please see updated [Web Setup](README.md#web-setup) section in the README for details.
 * Docs: update README, NOTES & CHANGELOG
-* Feat: [Web] Add [web_callkit](https://pub.dev/packages/web_callkit) support.
 * Feat: [Web] Update example with custom incoming ringtone field.
 * Feat: [Web] Add custom sounds for Twilio Device using `updateSound(SoundName, String?)` or `updateSounds(Map<String, String>)` methods.
 * Fix: [Android] `call.isOnCall()` returns true when call is declined

README.md

@@ -187,6 +187,9 @@ See [example](https://github.com/cybex-dev/twilio_voice/blob/master/example/andr
 
 ### Web Setup:
 
+**BREAKING CHANGES:**
+Since we are now using `web_callkit` package, the web implementation requires copying over only 2 files, please see the required files below.
+
 Web requires 2 files to be copied over/provided for web implementation to work correctly. These files are:
 1. `twilio.min.js`
 2. `js_notifications-sw.js`