CollectionInput will always use item_wrapper_tag
Verify if `boolean_style` is :nested

Checking in the input options and in initialized configuration.
Merge branch 'master' into kb-ek-change-wraper-collection

Conflicts:
	CHANGELOG.md
	lib/simple_form/tags.rb
Fix tests
Fix changelog
Merge branch 'kb-ek-change-wraper-collection'