chore(deps): pin dependencies

[renovate[bot]]

This PR contains the following updates:

Package	Update	Change
requests (source, changelog)	pin	>=2.18.2 -> ==2.27.1
urllib3 (source)	pin	>=1.22 -> ==1.26.8

📌 Important: Renovate will wait until you have merged this Pin PR before creating any upgrade PRs for the affected packages. Add the preset :preserveSemverRanges to your config if you instead don't wish to pin dependencies.

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[coveralls]

Pull Request Test Coverage Report for Build 1769150881

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 82.431%

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Totals
Change from base Build 1769150411:	0.0%
Covered Lines:	685
Relevant Lines:	831

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💛 - Coveralls