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)