Bump httparty from 0.18.1 to 0.19.0

Bumps httparty from 0.18.1 to 0.19.0.

Changelog

Sourced from httparty's changelog.

0.19.0

• Multipart/Form-Data: rewind files after read
• add frozen_string_literal pragma to all files
• [Better handling of Accept-Encoding / Content-Encoding decompression (fixes #562)](https://github.com/jnunemaker/httparty/pull/729)

Commits

• b421336 Release 0.19.0
• fb7c403 Merge pull request #729 from tablecheck/fix-decompression
• 7268cb5 Fix ssl_spec
• 101543f Minor whitespace changes
• 868053f Add an example about International domain names (#669)
• fae9daf Better handling of Content-Encoding decompression
• 9ca514d Merge pull request #728 from enwumeh/master
• 74ac860 Create README.md
• cf18a37 Update README.md
• 8ceb806 Merge pull request #721 from bfad/fix-test-for-ruby-3
• Additional commits viewable in compare view