Bump httparty from 0.20.0 to 0.21.0 (#170)

Bumps [httparty](https://github.com/jnunemaker/httparty) from 0.20.0 to 0.21.0.
- [Release notes](https://github.com/jnunemaker/httparty/releases)
- [Changelog](https://github.com/jnunemaker/httparty/blob/master/Changelog.md)
- [Commits](jnunemaker/httparty@v0.20.0...v0.21.0)

---
updated-dependencies:
- dependency-name: httparty
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <[email protected]>

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