1.4.0 version bumps & pot refresh

Refresh pot file

Prepare plugin 1.2.0 release

* Bump stable tag to 1.2.0 & WP `Tested up to` version to 6.4
* Update changelog & readme.txt

Prepare version 1.1.0

- Adds a changelog
- Updates stable tag
- Refresh pot file

Bump plugin stable version to 1.0.0

Improve `readme.txt` & refresh pot file.

Improve readme.txt