WooCommerce Chained Products 3.7.0

* New: WooCommerce 4.1.1, 4.2.2, 4.3.3, 4.4.1 compatible
* New: WordPress 5.5 compatible
* Fix: Warning: A non-numeric value encountered
* Update: Housekeeping doc link in settings
* Update: Minor update in admin
* Update: Remove support for WooCommerce 2.5 and WooCommerce 2.6
* Update: POT file

* New: WooCommerce 3.9.3 & 4.0.1 compatible
* Fix: CSS showing in admin emails [WooCommerce Subscriptions]
* Fix: Incorrect price on simple product page when Priced Individually is enabled
* Update: Do not show price range for Variable Products having same price when Priced Individually is enabled
* Update: Check product instance before calling product functions
* Update: Disable autoload for options

* New: WooCommerce 3.8.0 compatible
* Fix: Conflict with Avada theme
* Fix: Showing incorrect stock status of variations having chained products
* Fix: Incorrect text domain
* Update: Tested upto WordPress 5.3.0
* Update: Compatible with the latest WordPress Standard (v2.2.0)
* Update: POT file