Update rack requirement from ~> 1.2 to ~> 2.2

[dependabot-preview]

Updates the requirements on rack to permit the latest version.

Changelog

Sourced from rack's changelog.

[2.2.1] - 2020-02-09

Fixed

• Rework Rack::Request#ip to handle empty forwarded_for. (#1577, @ioquatix)

[2.2.0] - 2020-02-08

SPEC Changes

• rack.session request environment entry must respond to to_hash and return unfrozen Hash. (@jeremyevans)
• Request environment cannot be frozen. (@jeremyevans)
• CGI values in the request environment with non-ASCII characters must use ASCII-8BIT encoding. (@jeremyevans)
• Improve SPEC/lint relating to SERVER_NAME, SERVER_PORT and HTTP_HOST. (#1561, @ioquatix)

Added

• rackup supports multiple -r options and will require all arguments. (@jeremyevans)
• Server supports an array of paths to require for the :require option. (@khotta)
• Files supports multipart range requests. (@fatkodima)
• Multipart::UploadedFile supports an IO-like object instead of using the filesystem, using :filename and :io options. (@jeremyevans)
• Multipart::UploadedFile supports keyword arguments :path, :content_type, and :binary in addition to positional arguments. (@jeremyevans)
• Static supports a :cascade option for calling the app if there is no matching file. (@jeremyevans)
• Session::Abstract::SessionHash#dig. (@jeremyevans)
• Response.[] and MockResponse.[] for creating instances using status, headers, and body. (@ioquatix)
• Convenient cache and content type methods for Rack::Response. (#1555, @ioquatix)

Changed

• Request#params no longer rescues EOFError. (@jeremyevans)
• Directory uses a streaming approach, significantly improving time to first byte for large directories. (@jeremyevans)
• Directory no longer includes a Parent directory link in the root directory index. (@jeremyevans)
• QueryParser#parse_nested_query uses original backtrace when reraising exception with new class. (@jeremyevans)
• ConditionalGet follows RFC 7232 precedence if both If-None-Match and If-Modified-Since headers are provided. (@jeremyevans)
• .ru files supports the frozen-string-literal magic comment. (@eregon)
• Rely on autoload to load constants instead of requiring internal files, make sure to require 'rack' and not just 'rack/...'. (@jeremyevans)
• Etag will continue sending ETag even if the response should not be cached. (@henm)
• Request#host_with_port no longer includes a colon for a missing or empty port. (@AlexWayfer)
• All handlers uses keywords arguments instead of an options hash argument. (@ioquatix)
• Files handling of range requests no longer return a body that supports to_path, to ensure range requests are handled correctly. (@jeremyevans)
• Multipart::Generator only includes Content-Length for files with paths, and Content-Disposition filename if the UploadedFile instance has one. (@jeremyevans)
• Request#ssl? is true for the wss scheme (secure websockets). (@jeremyevans)
• Rack::HeaderHash is memoized by default. (#1549, @ioquatix)
• Rack::Directory allow directory traversal inside root directory. (#1417, @ThomasSevestre)
• Sort encodings by server preference. (#1184, @ioquatix, @wjordan)
• Rework host/hostname/authority implementation in Rack::Request. #host and #host_with_port have been changed to correctly return IPv6 addresses formatted with square brackets, as defined by RFC3986. (#1561, @ioquatix)
• Rack::Builder parsing options on first #\ line is deprecated. (#1574, @ioquatix)

Removed

... (truncated)

Commits

• 961d976 Prepare point release.
• 2d00d05 Add CHANGELOG entry for #1577.
• f8fd024 Update CHANGELOG to include 2.2.0.
• 21e7aac Rework Request#ip to handle empty forwarded_for.
• 39d501a fix release task
• ceab14f Update SPEC filename in gemspec
• b500b84 Update links.
• 1d5f8df Tidy up gemspec.
• 9045515 Deprecate option parsing in config.ru files.
• 84b2181 Update CHANGELOG to include 2.1.2
• Additional commits viewable in compare view

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