Bump parsy from 1.4.0 to 2.0 in /requirements (#19675)
Bump parsy from 1.4.0 to 2.0 in /requirements (#19675)

Bumps [parsy](https://github.com/python-parsy/parsy) from 1.4.0 to 2.0.
- [Release notes](https://github.com/python-parsy/parsy/releases)
- [Changelog](https://github.com/python-parsy/parsy/blob/master/docs/history.rst)
- [Commits](https://github.com/python-parsy/parsy/compare/v1.4.0...v2.0)

---
updated-dependencies:
- dependency-name: parsy
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@github.com>

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@github.com>
Co-authored-by: dependabot[bot] <1c358da00a777d4e9898c1280ab801e2df165188@users.noreply.github.com>
mozilla/addons-server,diox/olympia,mozilla/addons-server,wagnerand/addons-server,wagnerand/addons-server,wagnerand/addons-server,wagnerand/addons-server,diox/olympia,mozilla/addons-server,diox/olympia,diox/olympia,mozilla/addons-server