add tests for disabled select options
update required Mojolicious version (needed as we use 'every_param')
add test for two fields defined in the json config
do not return an array of fields, but a single string (makes use in templates easier)
add tests for select field data as hashref
handle select field data that is a hashref
add tests for optgroup handling for select fields
fix optgroup handling: pass the correct datastructure to subroutine
update Changes