Match no longer handling regex

[esalesky]

behavior that worked with Match in 0.3:

const emptyline = r"^(\s*)$"
x = "   "
@match x begin
  emptyline(x) => print("nothing there")
  _            => print("else")
end

now throws:

ERROR: TypeError: isa: expected Type{T}, got Regex

[gafter]

This works:

x = "   "
@match x begin
  r"^(\s*)$" => print("nothing there")
  _            => print("else")
end

or

const emptyline = r"^(\s*)$"
x = "   "
@match x begin
  $emptyline => print("nothing there")
  _            => print("else")
end