Bump httparty to version 1.16.4
What does this MR do?
Bump httparty to version 1.16.4. Previous version is 4 years old. It also adds support for Ruby 2.6.
I need it for https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/9750
Changes since 0.13.3 can be seen in changelog https://github.com/jnunemaker/httparty/blob/master/Changelog.md.
The major change is that HTTParty will parse response by default https://github.com/jnunemaker/httparty/tree/master/docs#parsing-json so there is no need for extra to_json call
EE version
https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/10292
Issue
Edited by Dmytro Zaporozhets (DZ)