Social Auto Poster 5.4.3

* [*] Fix: Optimized the plugin code.
* [*] Fix: Fixed an issue of content limit with Facebook & Instagram posting.
* [*] Fix: Fixed an issue of hourly schedule settings.

[+] New: Added a feature of multiple image posting on Instagram.

* [+] New: Added a compatibility with HPOS.
* [*] Fix: Fixed an issue of content limit with Linkedin posting.

New: Announcement added about Linkedin API method being deprecated.

* [*] Fix: Optimized the plugin code.
* [*] Fix: Fixed an issue of LinkedIn account getting removed upon save.

New: Added licensing validation to use the plugin.

New: Removed custom automatic updater logic and added compatibility with Envato Market plugin for easy updates.

Fix: Fixed an issue of wrong posting status for GMB.

Fix: Fixed an issue of resposter schedule minutes save issue.

* [*] Fix: Fixed an issue of Pinterest grant extend permission not working.