Pychord

- Add tests for "M" and "maj" qualities synonyms
- Add missing synonyms for M qualities
- Contributor: nickurak

- Add `get_qualities` method to `QualityManager`.
- Contributor: nickurak

- Add `chromatic` parameter for `from_note_index`.
- Add `7(b9)`, `6b5` qualities.
- Contributor: Moustov, hejops

- Add `m11` and `maj13` qualities.
- Fix TypeError.
- Contributor: Moustov

- Add `no5`, `m(no5)`, `(b5)`, `sus4add2` and `sus4add9` qualities.
- Support inversions.
- Contributor: EnigmaCurry

- Drop compatibility for Python 2.7 and 3.5.
- Refactor whole library to optimize for Python 3.x.
- Add type hints.
- Use f-strings.
- Rename `note_to_chord` to `find_chords_from_notes`.
- Use tuple instead of list for `Quality.components`.