Rename empty to new in Data.Array.ST

[kl0tl]

The foreign object equivalent of Data.Array.ST.empty is called new and in purescript/purescript-record#68 I proposed to add Record.ST.new for consistency. Should we also rename Data.Array.ST.empty to new then?

[JordanMartinez]

I think we should be consistent across all of the ST repos, so I'm for this.

[JordanMartinez]

This was closed by #191.