Mutwo.abjad

Added
- `replace_leaf_by_leaf` property for all abjad attachments
- `NaturalHarmonicNodeList` attachment

Changed
- internal structure of abjad attachments: see [here](https://github.com/mutwo-org/mutwo.abjad/commit/7a6dcfb3969349a3c867bf808f214e005a0bd472).

Removed
- `NaturalHarmonic` attachment
- `PreciseNaturalHarmonic` attachment

Added

`abjad_converters.SequentialEventToQuantizedAbjadContainer`
- `event_to_tempo_envelope` argument in init
- `event_to_time_signature_tuple` argument in init

`abjad_converters.SequentialEventToAbjadVoice`
- `default_tempo_envelope` to init
- `event_to_tempo_envelope` to init

Changed
`abjad_converters.SequentialEventToQuantizedAbjadContainer`
- `time_signature_sequence` argument to `default_time_signature_sequence`

Removed
`abjad_converters.SequentialEventToQuantizedAbjadContainer`
- `tempo_envelope` argument

Dropped
- python 3.9 support

Changed
- from abjad 3.4 to abjad 3.7 (actually abjad 3.7 is the last version which support lilypond 2.22.X)

Changed
- `mutwo.ext-abjad` to `mutwo.abjad`
- `expenvelope.Envelope` to `core_events.TempoEnvelope`

Changed
- `abjad_converters.RMakersSequentialEventToQuantizedAbjadContainer` to `abjad_converters.LeafMakerSequentialEventToQuantizedAbjadContainer`
- `abjad_converters.RMakersSequentialEventToDurationLineBasedQuantizedAbjadContainer` to `abjad_converters.LeafMakerSequentialEventToDurationLineBasedQuantizedAbjadContainer`

Fixed
- quantization of very long leafs by `abjad_converters.LeafMakerSequentialEventToQuantizedAbjadContainer`

Removed
- `abjad-ext-rmakers` dependency

Added
- monkey patches for `abjad` in `mutwo_third_party/abjad`

Changed
- `Hairpin` attachment
- changed bad converter names (XToYConverter -> XToY)