community/weechat-perl: fix Pod::Select dependency

Multiple Weechat perl scripts require Pod::Select:

• chanmon.pl
• coords.pl
• luanma.pl
• menu.pl
• multiline.pl
• spell_menu.pl

This has been deprecated and removed in latest perl versions:

https://github.com/weechat/scripts/issues/421

We make weechat-perl to depends on perl-pod-parser to fix the issue until an alternative is found upstream.