Bump rack from 1.5.2 to 1.6.12 in /answersBackupService

[dependabot]

Bumps rack from 1.5.2 to 1.6.12.

Changelog

Sourced from rack's changelog.

[1.6.12] - 2019-12-08

• [CVE-2019-16782] Prevent timing attacks targeted at session ID lookup. (@​tenderlove, @​rafaelfranca)

[2.0.7] - 2019-04-02

Fixed

• Remove calls to #eof? on Rack input in Multipart::Parser, as this breaks the specification. (@​matthewd)
• Preserve forwarded IP addresses for trusted proxy chains. (@​SamSaffron)

[2.0.6] - 2018-11-05

Fixed

• [CVE-2018-16470] Reduce buffer size of Multipart::Parser to avoid pathological parsing. (@​tenderlove)
• Fix a call to a non-existing method #accepts_html in the ShowExceptions middleware. (@​tomelm)
• [CVE-2018-16471] Whitelist HTTP and HTTPS schemes in Request#scheme to prevent a possible XSS attack. (@​PatrickTulskie)

[2.0.5] - 2018-04-23

Fixed

• Record errors originating from invalid UTF8 in MethodOverride middleware instead of breaking. (@​mclark)

[2.0.4] - 2018-01-31

Changed

• Ensure the Lock middleware passes the original env object. (@​lugray)
• Improve performance of Multipart::Parser when uploading large files. (@​tompng)
• Increase buffer size in Multipart::Parser for better performance. (@​jkowens)
• Reduce memory usage of Multipart::Parser when uploading large files. (@​tompng)
• Replace ConcurrentRuby dependency with native Queue. (@​devmchakan)

Fixed

• Require the correct digest algorithm in the ETag middleware. (@​matthewd)

Documentation

• Update homepage links to use SSL. (@​hugoabonizio)

[2.0.3] - 2017-05-15

Changed

• Ensure env values are ASCII 8-bit encoded. (@​eileencodes)

Fixed

... (truncated)

Commits

• de902e4 Merge branch '1-6-sec' into 1-6-stable
• b7d6546 Bump version
• d3e2f88 making diff smaller
• 99a8a87 fix memcache tests on 1.6
• f2cb48e fix tests on 1.6
• 7ff635c Introduce a new base class to avoid breaking when upgrading
• 3232f93 Add a version prefix to the private id to make easier to migrate old values
• 15da2e5 Fallback to the public id when reading the session in the pool adapter
• 1a532d1 Also drop the session with the public id when destroying sessions
• 9fe40c6 Fallback to the legacy id when the new id is not found
• Additional commits viewable in compare view

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Superseded by #30.