[Security] Bump requests from 2.19.1 to 2.21.0

Bumps requests from 2.19.1 to 2.21.0. This update includes security fixes.

Vulnerabilities fixed

*Sourced from The GitHub Security Advisory Database.* > **Moderate severity vulnerability that affects requests** > The Requests package through 2.19.1 before 2018-09-14 for Python sends an HTTP Authorization header to an http URI upon receiving a same-hostname https-to-http redirect, which makes it easier for remote attackers to discover credentials by sniffing the network. > > Affected versions: <= 2.19.1

Changelog

*Sourced from [requests's changelog](https://github.com/requests/requests/blob/master/HISTORY.md).* > 2.21.0 (2018-12-10) > ------------------- > > **Dependencies** > > - Requests now supports idna v2.8. > > 2.20.1 (2018-11-08) > ------------------- > > **Bugfixes** > > - Fixed bug with unintended Authorization header stripping for > redirects using default ports (http/80, https/443). > > 2.20.0 (2018-10-18) > ------------------- > > **Bugfixes** > > - Content-Type header parsing is now case-insensitive (e.g. > charset=utf8 v Charset=utf8). > - Fixed exception leak where certain redirect urls would raise > uncaught urllib3 exceptions. > - Requests removes Authorization header from requests redirected > from https to http on the same hostname. (CVE-2018-18074) > - `should_bypass_proxies` now handles URIs without hostnames (e.g. > files). > > **Dependencies** > > - Requests now supports urllib3 v1.24. > > **Deprecations** > > - Requests has officially stopped support for Python 2.6.

Commits

- [`5a1e738`](https://github.com/requests/requests/commit/5a1e738ea9c399c3f59977f2f98b083986d6037a) v2.21.0 - [`8761e97`](https://github.com/requests/requests/commit/8761e9736f7d5508a5547cdf3adecbe0b7306278) Bumped maximum version of idna - [`abe950c`](https://github.com/requests/requests/commit/abe950cfd3ee437279ca23866da6571571b637a6) Revert "Set up Azure Pipelines for Linux and Windows" - [`c35f342`](https://github.com/requests/requests/commit/c35f34263ae9162b91b7a57ca64594e9a296b617) Merge pull request [#4898](https://github-redirect.dependabot.com/requests/requests/issues/4898) from requests/revert_azure - [`0dd4752`](https://github.com/requests/requests/commit/0dd4752598719c4466e46c58e9de862bdb925934) revert azure pipeline changes - [`57d7284`](https://github.com/requests/requests/commit/57d7284c1a245cf9fbcecb594f50471d86e879f7) Merge pull request [#4874](https://github-redirect.dependabot.com/requests/requests/issues/4874) from kaylangan/patch-1 - [`fc9dfac`](https://github.com/requests/requests/commit/fc9dfac2b9d1861734fabd0eb2da7b9bd14fa736) Add build badge for Azure Pipelines - [`bc3eddc`](https://github.com/requests/requests/commit/bc3eddc6eda5ec1937a9103a475a73ed6557cb9b) Delete settings.json - [`d911f27`](https://github.com/requests/requests/commit/d911f278689bf10b7a74c5b1e8e4f2af103e87d7) Delete install.ps1 - [`3da2f10`](https://github.com/requests/requests/commit/3da2f10290a0dc78e34031856438ef1fed4e7435) Delete .travis.yml - Additional commits viewable in [compare view](https://github.com/requests/requests/compare/v2.19.1...v2.21.0)

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mozilla / servicebook

[Security] Bump requests from 2.19.1 to 2.21.0 #171