Regex getIconvVersion accounts for ending bracket

Iconv version output looks something like:

```iconv (GNU libiconv 1.14)
Copyright (C) 2000-2011 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
Written by Bruno Haible.```

The previous regex matched till "iconv (GNU libiconv 1.14" but did not account for the trailing bracket, resulting in no matches.

Since we have /m, it is safe to just add .*$ after we get our relevant part (the version number)
Merge pull request #2 from CumpsD/patch-1

Regex getIconvVersion accounts for ending bracket