Ms3

**ms3 requires Python 3.10**

- Refines the new \"writing score headers\" functionality and makes it
non-default. User needs to set `ms3 metadata --prelims` which
replaces the flag `--ignore` that had been introduced in 1.1.1.
- A couple of bug fixes, including a very important one regarding
conversion of fifths introduced with b0ce8a1d

**ms3 requires Python 3.10**

- enables updating score headers from the respective
[metadata.tsv]{.title-ref} columns ([title_text]{.title-ref},
[subtitle_text]{.title-ref}, [composer_text]{.title-ref},
[lyricist_text]{.title-ref}, and [part_name_text]{.title-ref})
- Parse, Corpus, and Piece now come with the method keys()

**ms3 requires Python 3.10**

This version does not throw errors when trying to parse files created by
MuseScore 4. Parsing these files has not sufficiently been tested but so
far it was looking good. The fact that MuseScore 3 is able to read such
files shows that not much has changed in the file format itself.

The command `ms3 convert` has been updated to support MuseScore 4
executables. With the current MuseScore 4.0.0 this is not quite
straightforward because conversion to `.mscz` via the commandline isn\'t
currently working and conversion to `.mscx`, if it works at all, deletes
the contents of the target directory ([issue
15367](https://github.com/musescore/MuseScore/issues/15367#issuecomment-1369783686)).
The new function `utils.convert_to_ms4()` offers a workaround that
creates temporary directories to store the \"Uncompressed MuseScore
folder\" and then copies the `.mscx` file to the target directory
(default) or zips the temporary directory into an `.mscz` file
(parameter `--format mscz`). For all other target formats, the output
will correspond to what the MuseScore 4 executable yields.