Modified __construct()
Constructor now iterates through cpt_models parameter to store as key/value pair with the CPT slug as the key
Modified unit test to match
Modified __construct
Removed $_cpt_models property
Modified method add_model()
Added parameter $model
Added type hinting
Removed add_actions
Added return value of $_cpt_models
Modified unit tests to reflect
Updated setUp() to reflect changes to Base_Model_CPT::__construct()
Removed testConstructorFailWrongObjectType