Update faraday requirement from ~> 0.9.2 to >= 0.9.2, < 0.16.0

[dependabot-preview]

Updates the requirements on faraday to permit the latest version.

Release notes

Sourced from faraday's releases.

Faraday 0.15.4

• Expose pool_size as a option for the NetHttpPersistent adapter (#834)

Changelog

Sourced from faraday's changelog.

Faraday Changelog

For newer changes, please see https://github.com/lostisland/faraday/releases

v0.9.1

• Refactor Net:HTTP adapter so that with_net_http_connection can be overridden to allow pooled connections. (@​Ben-M)
• Add configurable methods that bypass retry_if in the Retry request middleware. (@​mike-bourgeous)

v0.9.0

• Add HTTPClient adapter (@​hakanensari)
• Improve Retry handler (@​mislav)
• Remove autoloading by default (@​technoweenie)
• Improve internal docs (@​technoweenie, @​mislav)
• Respect user/password in http proxy string (@​mislav)
• Adapter options are structs. Reinforces consistent options across adapters
  (@​technoweenie)
• Stop stripping trailing / off base URLs in a Faraday::Connection. (@​technoweenie)
• Add a configurable URI parser. (@​technoweenie)
• Remove need to manually autoload when using the authorization header helpers on Faraday::Connection. (@​technoweenie)
• Faraday::Adapter::Test respects the Faraday::RequestOptions#params_encoder option. (@​technoweenie)

Commits

• 1db9340 Version bump to 0.15.4
• f18a248 Expose pool_size as a option for the NetHttpPersistent adapter (#834)
• 88de44e Fix label name for contributing
• 81274c9 Version bump to 0.15.3
• e306bd6 Add support for Ruby 2.6 Net::HTTP write_timeout (#824)
• 9478d59 ISSUE_TEMPLATE: Fix a typo (#820)
• f26a8d6 Add DEFAULT_EXCEPTIONS constant to Request::Retry (#814)
• f08a985 Make Faraday::Request serialisable with Marshal. (#803)
• 8ba0797 Version bump to 0.15.2
• aafbb24 #800 correct handling parameter value empty array (#801)
• Additional commits viewable in compare view

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[dependabot-preview]

Superseded by #7.