Silence Multipart/Post depreciation warnings

[chaffeqa]

When starting up an app, you get:

Top level ::CompositeIO is deprecated, require 'multipart/post' and use `Multipart::Post::CompositeReadIO` instead!
Top level ::Parts is deprecated, require 'multipart/post' and use `Multipart::Post::Parts` instead!
.../faraday-0.17.5/lib/faraday/upload_io.rb:65: warning: constant ::UploadIO is deprecated
.../faraday-0.17.5/lib/faraday/upload_io.rb:66: warning: constant ::Parts is deprecated

Description

A few sentences describing the overall goals of the pull request's commits. Link to related issues if any. (As Fixes #XXX)

Todos

List any remaining work that needs to be done, i.e:

• [ ] Tests
• [ ] Documentation

Additional Notes

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[iMacTia]

Thank you for opening this @chaffeqa.

We currently state the following in our gemspec:

spec.add_dependency 'multipart-post', '>= 1.2', '< 3'

Do you know if multipart/post is available in all those versions or if it was introduced later?

[chaffeqa]

Bleh great call... just refactored it. Not the most beautiful code, but gets the job done.

(Cannot wait until we can update faraday in our app!)

[ioquatix]

Thanks everyone!