Surround aliases not working as targets

[vogler]

Is this a BUG REPORT or FEATURE REQUEST? (choose one):
Bug

What happened:
ds( and ds) work on foo (bar) baz, but dsb does not. It seems like aliases only work for replacements (and not targets): cs(B works while csbB does not.

Also, the aliases should correspond to closing brackets instead of opening ones:
"The targets b, B, r, and a are aliases for ), }, ], and >"
https://github.com/tpope/vim-surround/blob/master/doc/surround.txt#L99

Environment:

• Extension (VsCodeVim) version: 0.13.1
• VSCode version: Code 1.24.1 (24f6262, 2018-06-13T17:41:50.128Z)
• OS version: Darwin x64 17.7.0

[xconverge]

This was an easy one, should be in the next release, and thanks for the link to the documentation, it made my job easier!