tests: add Unicode Base and Prototype Methods tests
tests: add Unicode Base and Prototype Methods tests

cesarmarinhorj/xregexp,slevithan/xregexp,Iced-Tea/xregexp,BeardandFedora/xregexp,GerHobbelt/xregexp,Akylas/xregexp,vsimonian/xregexp,Iced-Tea/xregexp,Akylas/xregexp,slevithan/xregexp,exexzian/xregexp,GerHobbelt/xregexp,exexzian/xregexp,kod3r/xregexp,slevithan/xregexp,carabina/xregexp,imvijaybala/xregexp,vsimonian/xregexp,mathiasbynens/xregexp,mathiasbynens/xregexp,mathiasbynens/xregexp,slevithan/XRegExp,GerHobbelt/xregexp,sagarrakshe/xregexp,imvijaybala/xregexp,carabina/xregexp,kod3r/xregexp,sagarrakshe/xregexp,mathiasbynens/xregexp,cesarmarinhorj/xregexp,slevithan/XRegExp