README: Change ~~~ since it isn't recognized by npm registry
README: Change ~~~ since it isn't recognized by npm registry

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