chore(deps): update dependency httpx to >=0.15.4,<0.21.2

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
httpx (changelog)	>=0.15.4,<0.21.0 -> >=0.15.4,<0.21.2

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Release Notes

encode/httpx

v0.21.1

Compare Source

Fixed

• The response.url property is now correctly annotated as URL, instead of Optional[URL]. (#​1940)

v0.21.0

Compare Source

The 0.21.0 release integrates against a newly redesigned httpcore backend.

Both packages ought to automatically update to the required versions, but if you are
seeing any issues, you should ensure that you have httpx==0.21.* and httpcore==0.14.* installed.

Added

• The command-line client will now display connection information when -v/--verbose is used.
• The command-line client will now display server certificate information when -v/--verbose is used.
• The command-line client is now able to properly detect if the outgoing request
  should be formatted as HTTP/1.1 or HTTP/2, based on the result of the HTTP/2 negotiation.

Removed

• Curio support is no longer currently included. Please get in touch if you require this, so that we can assess priorities.

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Configuration

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[codecov]

Codecov Report

Merging #537 (caa305d) into main (ccf1fab) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##              main      #537   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           48        48           
  Lines         1639      1639           
=========================================
  Hits          1639      1639           

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