YITH WooCommerce Customize My Account Page 4.14.0

* New: Support for WooCommerce 4.0
* New: Support for WordPress 5.4
* New: Compatibility with YITH WooCommerce Booking
* New: Compatibility with YITH WooCommerce Account Funds
* Update: Plugin framework
* Update: Language files
* Fix: Avoid dashboard endpoint content from being empty

* New: Support for WooCommerce 3.9
* Update: Plugin framework
* Update: Spanish language

* New: Support to YITH WooCommerce Wishlist 3.0.4
* Update: Dutch language
* Fix: Typo for erase_avatar method