Double deprecation when expanding def

[HertzDevil]

If a call to a deprecated method requires a def expansion, the expanded def might produce its own deprecation warning. For example, it happens with default arguments:

@[Deprecated]
def test(x, y = 0)
end

test 1

In test.cr:5:1

 5 | test 1
     ^---
Warning: Deprecated top-level test.

In test.cr:2:1

 2 | def test(x, y = 0)
     ^---
Warning: Deprecated top-level test.

A total of 2 warnings were found.

and with out-of-order named arguments:

@[Deprecated]
def test(x, y)
end

test y: 1, x: 2

In test.cr:5:1

 5 | test y: 1, x: 2
     ^---
Warning: Deprecated top-level test:y:x.

In test.cr:2:1

 2 | def test(x, y)
     ^---
Warning: Deprecated top-level test.

A total of 2 warnings were found.