Switch from WP_ENV to WP_ENVIRONMENT_TYPE

[joemaller]

WordPress 5.5 added native support for environment types:

https://make.wordpress.org/core/2020/07/24/new-wp_get_environment_type-function-in-wordpress-5-5/

might as well switch to that instead of the WP_ENV workaround.

docker-wordpress-dev/src/wp-config-extra.php

Lines 29 to 32 in 52f1f25

	/**
	* Useful idea from https://roots.io/
	*/
	define('WP_ENV', 'development');