Bump requests from 2.19.1 to 2.20.0 in /spider

[dependabot[bot]]

Bumps requests from 2.19.1 to 2.20.0.

Changelog

Sourced from requests's changelog.

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

• bd84045 v2.20.0
• 7fd9267 remove final remnants from 2.6
• 6ae8a21 Add myself to AUTHORS
• 89ab030 Use comprehensions whenever possible
• 2c6a842 Merge pull request #4827 from webmaven/patch-1
• 30be889 CVE URLs update: www sub-subdomain no longer valid
• a6cd380 Merge pull request #4765 from requests/encapsulate_urllib3_exc
• bbdbcc8 wrap url parsing exceptions from urllib3's PoolManager
• ff0c325 Merge pull request #4805 from jdufresne/https
• b0ad249 Prefer https:// for URLs throughout project
• Additional commits viewable in compare view

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[dependabot[bot]]

Dependabot tried to update this pull request, but something went wrong. We're looking into it, but in the meantime you can retry the update by commenting @dependabot rebase.

[dependabot[bot]]

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If you change your mind, just re-open this PR and I'll resolve any conflicts on it.