This commit changes
\MailPoet\Segments\WooCommerce::insertSubscriberFromOrder() to use
WooCommerce method instead of querying the database directly. This is
needed as WooCommerce is moving away from WP tables and creating its own
tables.
[MAILPOET-4570]
Remove the following errors:
(Method|Property|Function) has no (return )?type specified.
(Method|Function) has parameter with no type (specified).
[MAILPOET-3720]
If the default collation of database would vary from the one
from created tables it would cause the temp table created to
have a different collation than the main tables
[MAILPOET-4251]
