Form components have been removed. This addon was never meant to provide all form components but was forced to while Ember EasyForm has no 1.13+ compatibility. Now, Ember EasyForm has a 1.0.0.rc-1 release.
Better still, this library no longers requires Ember EasyForm and can be used with an form components, including your own or those of a library like Ember Paper, Ember EasyForm, Ember Rapid Forms, etc.