Bump nats-py from 2.2.0 to 2.4.0 in /streampipes-client-python (#1937)

Bumps [nats-py](https://github.com/nats-io/nats.py) from 2.2.0 to 2.4.0.
- [Release notes](https://github.com/nats-io/nats.py/releases)
- [Commits](nats-io/nats.py@v2.2.0...v2.4.0)

---
updated-dependencies:
- dependency-name: nats-py
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>