alias method for block declarations

[HoneyryderChuck]

For methods with the following signature:

def on: (Symbol) { (*untyped) -> void } -> void

I usually use the following in ruby code:

on(&method(:foo))

This works, but rbs/steep complains:

Cannot pass a value of type `::Method` as a block-pass-argument of type `^(*untyped) -> void`
  ::Method <: ^(*untyped) -> void

I think this should be allowed.