Set store credit amount input step to any.
Set store credit amount input step to any.

This will allow decimal values in the store step, such as, $0.02.
Previously this would lead to an error where an HTML5 compatible browser
would ask you to input either 0 or 1.

Bombsheller/spree_store_credit_payment_method,Bombsheller/spree_store_credit_payment_method,Bombsheller/spree_store_credit_payment_method