Make tags matching case insensitive
Make tags matching case insensitive

This closes https://github.com/select2/select2/issues/3566
This closes https://github.com/select2/select2/pull/4509

inway/select2,iestruch/select2,ZaArsProgger/select2,iestruch/select2,select2/select2,select2/select2,inway/select2,bottomline/select2,ZaArsProgger/select2,bottomline/select2