Fix lexer to support base 16 integer literals (0x)
Fix lexer to support base 16 integer literals (0x)

Mogztter/opal,Mogztter/opal,opal/opal,gausie/opal,bbatsov/opal,kachick/opal,bbatsov/opal,iliabylich/opal,jannishuebl/opal,jannishuebl/opal,opal/opal,merongivian/opal,fazibear/opal,c42engineering/opal,gabrielrios/opal,wied03/opal,gabrielrios/opal,kachick/opal,fazibear/opal,castwide/opal,catprintlabs/opal,catprintlabs/opal,Mogztter/opal,suyesh/opal,jannishuebl/opal,kachick/opal,opal/opal,Mogztter/opal,Ajedi32/opal,suyesh/opal,Ajedi32/opal,kachick/opal,Flikofbluelight747/opal,gausie/opal,castwide/opal,iliabylich/opal,Flikofbluelight747/opal,opal/opal,wied03/opal,c42engineering/opal,jgaskins/opal,fazibear/opal,iliabylich/opal,domgetter/opal,suyesh/opal,merongivian/opal,merongivian/opal,catprintlabs/opal,gausie/opal,c42engineering/opal,castwide/opal,Ajedi32/opal,jgaskins/opal,wied03/opal,jgaskins/opal,gabrielrios/opal,Flikofbluelight747/opal,domgetter/opal,bbatsov/opal