Update vendored beets to 1.6.0

Updates colorama to 0.4.6
Adds confuse version 1.7.0
Updates jellyfish to 0.9.0
Adds mediafile 0.10.1
Updates munkres to 1.1.4
Updates musicbrainzngs to 0.7.1
Updates mutagen to 1.46.0
Updates pyyaml to 6.0
Updates unidecode to 1.3.6

libs/common/share/man/man1/mid3iconv.1

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+.\" Man page generated from reStructuredText.
+.
+.TH MID3ICONV 1 "" "" ""
+.SH NAME
+mid3iconv \- convert ID3 tag encodings
+.
+.nr rst2man-indent-level 0
+.
+.de1 rstReportMargin
+\\$1 \\n[an-margin]
+level \\n[rst2man-indent-level]
+level margin: \\n[rst2man-indent\\n[rst2man-indent-level]]
+-
+\\n[rst2man-indent0]
+\\n[rst2man-indent1]
+\\n[rst2man-indent2]
+..
+.de1 INDENT
+.\" .rstReportMargin pre:
+. RS \\$1
+. nr rst2man-indent\\n[rst2man-indent-level] \\n[an-margin]
+. nr rst2man-indent-level +1
+.\" .rstReportMargin post:
+..
+.de UNINDENT
+. RE
+.\" indent \\n[an-margin]
+.\" old: \\n[rst2man-indent\\n[rst2man-indent-level]]
+.nr rst2man-indent-level -1
+.\" new: \\n[rst2man-indent\\n[rst2man-indent-level]]
+.in \\n[rst2man-indent\\n[rst2man-indent-level]]u
+..
+.SH SYNOPSIS
+.sp
+\fBmid3iconv\fP [\fIoptions\fP] \fIfilename\fP ...
+.SH DESCRIPTION
+.sp
+\fBmid3iconv\fP converts ID3 tags from legacy encodings to Unicode and stores
+them using the ID3v2 format.
+.SH OPTIONS
+.INDENT 0.0
+.TP
+.B \-\-debug\fP,\fB  \-d
+Print updated tags
+.TP
+.B \-\-dry\-run\fP,\fB  \-p
+Do not actually modify files
+.TP
+.B \-\-encoding\fP,\fB  \-e
+Convert from this encoding. By default, your locale\(aqs default encoding is
+used.
+.TP
+.B \-\-force\-v1
+Use an ID3v1 tag even if an ID3v2 tag is present
+.TP
+.B \-\-quiet\fP,\fB  \-q
+Only output errors
+.TP
+.B \-\-remove\-v1
+Remove any ID3v1 tag after processing the files
+.UNINDENT
+.SH AUTHOR
+.sp
+Emfox Zhou.
+.sp
+Based on id3iconv (\fI\%http://www.cs.berkeley.edu/~zf/id3iconv/\fP) by Feng Zhou.
+.\" Generated by docutils manpage writer.
+.