Version 2.1.6:
	* Version check for the plugin 'trx_addons' is disabled (if this plugin installed from the theme's folder)

Version 2.1.5:
	* Fix for the RevSlider plugin so that it does not change the URL of the server with updates
	  if RevSlider License Key is not specified in the plugin settings.

Version 2.1.4:
	* Increase the cache time for the theme and plugins info to 2 days

Version 2.1.3:
	* Calls to unlink() after unpacking the archive have been replaced by trx_updater_unlink(),
	  which pauses for 1ms on a failed deletion attempt, then resets the state cache for the file
	  being deleted and makes another deletion attempt.

Version 2.1.2:
	+ Fix for forced update of Booked plugin for versions 2.4.3 and younger is added, since the developer stopped supporting
	  the plugin and its update site does not work. Now this plugin is supported by another developer and he has released
	  a transitional version 2.4.4 to which it is suggested to update the plugin before switching to QuickCal

Version 2.1.1:
	* Condition for checking the type of the data in the 'backups_list' option is added.
	  In some cases it is not an array, but a string 'Array'.

Version 2.1.0:
	+ Filters to prevent backup all or some addons from the plugin "ThemeREX Addons" are added.
	* Fix for compatibility with PHP 8.2 is added.

Version 2.0.0:
	+ Сheck for incorrect value of the plugin name after its update is added. Some plugins return an array with plugin info
	  instead of plugin slug.

Version 1.9.9:
	* Backup / Restore FSE-compatible theme components (folders 'templates', 'parts' and the file 'theme.json') is improved.

Version 1.9.8:
	* Backup / Restore FSE-compatible theme components (folders 'templates', 'parts' and the file 'theme.json') is improved.

Version 1.9.7:
	* Backup / Restore FSE-compatible theme components (folders 'templates', 'parts' and the file 'theme.json') is added.

Version 1.9.6:
	* Fixes for compatibility with 3-rd party plugins are added.

Version 1.9.5:
	* Set a flag to regenerate merged styles and scripts after the plugin 'trx_addons' or a current theme is updated

Version 1.9.4:
	* JS warning in the Customizer is fixed

Version 1.9.3:
	+ Check multiskin themes is improved.
	+ Attention about a major update of the theme is added.

Version 1.9.2:
	+ Save and restore theme skins data are improved.

Version 1.9.1:
	+ Hooks before and after upgrade process are added.

Version 1.9.0:
	+ Upgrade for themes with renamed folder is added.

Version 1.8.0:
	* Support for updating theme-specific plugins for multisite is added.
	  Attention! Our theme, which needs to be updated with plugins, must be activated on the main site!

Version 1.7.0:
	* Save/restore skins on theme upgrade via third-party plugins (for example, Envato Market) is added

Version 1.6.0:
	* Save/restore skins on theme upgrade is added

Version 1.5.6:
	* File rtl.css is added to the list with theme excludes.

Version 1.5.5:
	* Disable all other 'upgrade' buttons after upgrade process started.

Version 1.5.4:
	* Old versions of 'trx_addons' are excluded from redirect to the upgrade server.

Version 1.5.3:
	+ Upgrade theme's core files is improved.
	+ Folders '.git', '.idea', '.vscode' is added to the 'exclude_folders',
	  file '.gitignore' is added to the 'exclude_files'

Version 1.5.2:
	+ Upgrade theme's core files is improved.

Version 1.5.1:
	+ Upgrade theme's core files is improved.

Version 1.5.0:
	+ Upgrade theme's core files is added (only for compatible themes).

Version 1.4.2:
	+ Save / restore addons when updating a new version of the plugin "ThemeREX Addons" is implemented.

Version 1.4.1:
	+ Save / restore skins when updating multi-skin themes is implemented.

Version 1.4.0:
	* Small changes to improve theme updates

Version 1.3.9:
	+ Filters 'trx_updater_filter_get_theme_info' and 'trx_updater_filter_get_plugins_info' are added

Version 1.3.8:
	* Fix: Check for updates of the main theme when child theme is active 

Version 1.3.7:
	+ Detection the activation code for old themes is added 

Version 1.3.6:
	+ The filter 'trx_updater_filter_theme_purchase_key' to override the theme's purchase key is added 

Version 1.3.5:
	+ Validation of the purchase key is now domain-specific 
	+ Checking for the possibility of updating the theme / plugin with the minimum allowed version is added

Version 1.3.4:
	* Compatibility with WordPress 5.3 is improved

Version 1.3.3:
	* Caching the server's response when theme version checking is improved

Version 1.3.2:
	* Auto activation plugins after update is added

Version 1.3.1:
	* Branch 'release' is added

Version 1.3.0:
	+ List of backups is added to the end of the page "Dashboard - Updates".
	  User can check some backups in the list and restore its (revert theme or plugin to its previous version)
	  or delete checked backups (to save disk space on the server)

Version 1.2.0:
	* Checking version of the current (active) theme is changed.
	+ The ability to back up plugins (themes) before update and restore previously saved versions is added.

Version 1.1.3:
	* Checking version of installed plugins is changed.

Version 1.1.2:
	* Order of checking plugins is changed: instead check all installed plugins,
	  only theme-required plugins (from TGMPA) are checked for updates.
	+ On first installation theme-required plugins also available from the upgrade-servers
	  instead pre-packaged archives.

Version 1.1.1:
	* Check if ThemeREX Updater is not in the TGMPA plugins list before insert it in the list.

Version 1.1.0:
	+ Separate classes for plugins and theme updates are added.
	+ The plugin's options page in admin menu Appearance - ThemeREX Updater is now available.
	+ Update manager run only if current theme is activated or the theme's purchase code is
	  specified in the plugin's options page.

Version 1.0.0:
	+ First release. Main features: allow update theme-specific plugins from upgrade server
	  if theme purchase key is specified.
