Update dependency webmock to v3.20.0

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
webmock (changelog)	'3.19.1' -> '3.20.0'

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Release Notes

bblimke/webmock (webmock)

v3.20.0

Compare Source

• Optimised EmHttpRequestAdapter performance.

  Thanks to Ricardo Trindade

  • Removed runtime dependency on base64.

    Thanks to Earlopain

  • Typhoeus::Response objects constructed from stubbed responses now have all timing attributes set to 0.0.

    Thanks to James Brown

  • Optimised WebMock::Util::Headers by removing redundant freeze invocations.

    Thanks to Kazuhiro NISHIYAMA

  • The default stubbed response body, which is an empty String, is unfrozen.

  • When building signatures of requests made by http.rb, the request body encoding is now preserved.

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[yegor256]

@rultor please, try to merge, since 7 checks have passed

[rultor]

@rultor please, try to merge, since 7 checks have passed

@yegor256 OK, I'll try to merge now. You can check the progress of the merge here

[rultor]

@rultor please, try to merge, since 7 checks have passed

@yegor256 Done! FYI, the full log is here (took me 2min)