Update http requirement to >= 0.9, < 4.0

[dependabot-preview]

Updates the requirements on http to permit the latest version.

Changelog

Sourced from http's changelog.

3.3.0 (2018-04-25)

This version backports some of the fixes and improvements made to development
version of the HTTP gem:

• #458
  Extract HTTP::Client#build_request method.
  ([tycoon])

3.2.1 (2018-04-24)

• #468
  Rewind HTTP::Request::Body#source once #each is complete.
  ([ixti])

3.2.0 (2018-04-22)

This version backports one change we missed to backport in previous release:

• Reduce memory usage when reading response body
  ([janko-m])

3.1.0 (2018-04-22)

This version backports some of the fixes and improvements made to development
version of the HTTP gem:

• Fix for #readpartial to respect max length argument.
  ([janko-m], [marshall-lee])

• Fix for HTTP::Request#headline to allow two leading slashes in path.
  ([scarfacedeb])

• Fix query string building for string with newlines.
  ([mikegee])

• Deallocate temporary strings in Response::Body#to_s.
  ([janko-m])

• Add Request::Body#source.
  ([janko-m])

3.0.0 (2017-10-01)

• Drop support of Ruby 2.0 and Ruby 2.1.
  ([ixti])

... (truncated)

Commits

• See full diff in compare view

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[dependabot-preview]

Superseded by #76.