filter is deprecated, but does not give a deprecation warning

Using `filter` gives no deprecation warning:
```
  | | |_| | | | (_| |  |  Version 0.6.0-pre.beta.83 (2017-04-08 21:57 UTC)
 _/ |\__'_|_|_|\__'_|  |  Commit 965c938eb* (0 days old master)
|__/                   |  x86_64-apple-darwin16.0.0

julia> v = [1, 2, 3, 4, 5]
5-element Array{Int64,1}:
 1
 2
 3
 4
 5

julia> filter(x->x>3, v)
2-element Array{Int64,1}:
 4
 5
```