WooCommerce Instagram 4.6.2

* Feature - Automatically renew the access credentials.
* Tweak - Keep the settings when disconnecting the Instagram account or removing the plugin.
* Tweak - Remove older update notices on plugin activation.
* Tweak - Added URL verification when connecting and disconnecting the Instagram account.
* Tweak - Increased `timeout` parameter for the API requests.
* Tweak - Added compatibility with WP 5.2.
* Fix - Fixed error when passing a callable as argument to the `empty()` function in PHP 5.4 and lower.
* Dev - Moved Instagram Graph API version to v3.3.

* Tweak - Added compatibility with WC 3.6.

* Feature - Use the new Instagram Graph API.
* Feature - Customize the frontend HTML content using WooCommerce template files.
* Feature - New and more intuitive settings page.
* Tweak - Added compatibility with WC 3.5.
* Tweak - Added compatibility with WP 5.0.
* Tweak - Updated Instagram logo.
* Tweak - Check the minimum requirements before initializing the plugin.
* Tweak - Remove the user credentials when uninstalling the plugin.
* Tweak - Optionally remove all the plugin data when uninstalling it.
* Tweak - Optimized the use of the API requests.
* Tweak - Better error handling for the API requests.
* Dev - Log possible errors in the API requests.
* Dev - Rewritten the entire extension.