Add required `wrapper_options` to input method
Add required `wrapper_options` to input method

Simple Form gem now requires that any implementation of the input
method now accepts a `wrapper_options` argument. The method definition
without the argument is deprecated and will be removed in the next
Simple Form version. This adds the required parameter and defaults it
to an empty hash.

Fixes #99

DanielNill/attachinary,jourdein/attachinary,jourdein/attachinary,townhouse/attachinary,assembler/attachinary,DanielNill/attachinary,DanielNill/attachinary,assembler/attachinary,assembler/attachinary,townhouse/attachinary,townhouse/attachinary,jourdein/attachinary