audio/abcde: resolve conflicting dependencies

abcde depends on www/p5-WebService-MusicBrainz0, but the installed script
'abcde-musicbrainz-tool' depends on www/p5-WebService-MusicBrainz. The two
versions of p5-WebService-MusicBrainz conflict with each other.
Update dependency to use p5-WebService-MusicBrainz, which is supported since
the update of audio/abcde to 2.9.x

Also adding the missing dependencies:

• p5-Digest-SHA
• p5-MusicBrainz-DiscID
• p5-WebService-MusicBrainz
• p5-Getopt-Long
• p5-Pod-Usage

At least release myself from being MAINTAINER of this port.

PR: 227660
Reported by: <perlhack@protonmail.com>
Reviewed by: <perlhack@protonmail.com>