Update BootstrapForm.php
Update BootstrapForm.php

Think this should be default_form instead of default_class. In the config file only default_form is present.
bnbwebexpertise/laravel-bootstrap-form,sdh100shaun/bootstrap-form,mitris/bootstrap-form,dwightwatson/bootstrap-form,smskin/bootstrap-form,SystemF/bootstrap-form,satishdeshmukh/bootstrap-form