Deprecated int(x) use in @enum

[jiahao]

Running the doctest in the @enum docs produces a deprecation warning:

julia> @enum FRUIT apple=1 orange=2 kiwi=3

julia> f(x::FRUIT) = "I'm a FRUIT with value: $(int(x))"
f (generic function with 1 method)

julia> f(apple)
WARNING: int(x) is deprecated, use Int(x) instead.
 in depwarn at ./deprecated.jl:42
 in int at deprecated.jl:31
 in f at none:1
"I'm a FRUIT with value: 1"