[Security] Bump twisted from 18.7.0 to 19.2.1

[dependabot-preview]

Bumps twisted from 18.7.0 to 19.2.1.

Changelog

Sourced from twisted's changelog.

Twisted 19.2.1 (2019-06-06)

No significant changes.

Conch

No significant changes.

Web

Bugfixes

• All HTTP clients in twisted.web.client now raise a ValueError when called with a method and/or URL that contain invalid characters. This mitigates CVE-2019-12387. Thanks to Alex Brasetvik for reporting this vulnerability. (#9647)

Mail

No significant changes.

Words

No significant changes.

Names

No significant changes.

Twisted 19.2.0 (2019-04-07)

This is the final release that will support Python 3.4.

Features

• twisted.internet.ssl.CertificateOptions now uses 32 random bytes instead of an MD5 hash for the ssl session identifier context. (#9463)
• DeferredLock and DeferredSemaphore can be used as asynchronous context managers on Python 3.5+. (#9546)
• t.i.b.BaseConnector has custom __repr__ (#9548)
• twisted.internet.ssl.optionsForClientTLS now supports validating IP addresses from the certificate subjectAltName (#9585)
• Twisted's minimum Cryptography requirement is now 2.5. (#9592)

Bugfixes

• twisted.web.proxy.ReverseProxyResource fixed documentation and example snippet (#9192)

... (truncated)

Commits

• c077685 towncrier
• 4cc45bd incremental
• 8a47339 Prevent CRLF injections described in CVE-2019-12387
• f9e12bd readme
• c49246d towncrier final
• 43d7718 Revert "19.2.0rc1 towncrier"
• d55affd Revert "twisted 19.2.0rc2 changelog"
• 99fec13 incremental
• 920966d twisted 19.2.0rc2 changelog
• f2fb8e3 twisted 19.2.0rc2
• Additional commits viewable in compare view

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[dependabot-preview]

We've just been alerted that this update fixes a security vulnerability:

Sourced from The GitHub Security Advisory Database.

Moderate severity vulnerability that affects twisted
In Twisted before 19.2.1, twisted.web did not validate or sanitize URIs or HTTP methods, allowing an attacker to inject invalid characters such as CRLF.

Affected versions: ["< 19.2.1"]

[dependabot-preview]

Superseded by #78.