Update httparty requirement from >= 0.17.1, < 0.19.0 to >= 0.17.1, < 0.20.0

Updates the requirements on [httparty](https://github.com/jnunemaker/httparty) to permit the latest version.
- [Release notes](https://github.com/jnunemaker/httparty/releases)
- [Changelog](https://github.com/jnunemaker/httparty/blob/master/Changelog.md)
- [Commits](jnunemaker/httparty@v0.17.1...v0.19.0)

---
updated-dependencies:
- dependency-name: httparty
  dependency-type: direct:production
...

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

Author: dependabot[bot]

meilisearch.gemspec

@@ -23,5 +23,5 @@ Gem::Specification.new do |s|
   ]
 
   s.required_ruby_version = '>= 2.6.0'
-  s.add_dependency 'httparty', '>= 0.17.1', '< 0.19.0'
+  s.add_dependency 'httparty', '>= 0.17.1', '< 0.20.0'
 end