Bump httpcore from 0.17.2 to 0.17.3

[dependabot]

⚠️ Dependabot is rebasing this PR ⚠️

Rebasing might not happen immediately, so don't worry if this takes some time.

Note: if you make any changes to this PR yourself, they will take precedence over the rebase.

---

Bumps httpcore from 0.17.2 to 0.17.3.

Release notes

Sourced from httpcore's releases.

Version 0.17.3

0.17.3 (5th July 2023)

• Support async cancellations, ensuring that the connection pool is left in a clean state when cancellations occur. (#726)
• The networking backend interface has been added to the public API. Some classes which were previously private implementation detail are now part of the top-level public API. (#699)
• Graceful handling of HTTP/2 GoAway frames, with requests being transparently retried on a new connection. (#730)
• Add exceptions when a synchronous trace callback is passed to an asynchronous request or an asynchronous trace callback is passed to a synchronous request. (#717)

Changelog

Sourced from httpcore's changelog.

0.17.3 (July 5th, 2023)

• Support async cancellations, ensuring that the connection pool is left in a clean state when cancellations occur. (#726)
• The networking backend interface has been added to the public API. Some classes which were previously private implementation detail are now part of the top-level public API. (#699)
• Graceful handling of HTTP/2 GoAway frames, with requests being transparently retried on a new connection. (#730)
• Add exceptions when a synchronous trace callback is passed to an asynchronous request or an asynchronous trace callback is passed to a synchronous request. (#717)
• Drop Python 3.7 support. (#727)

Commits

• 327e8bd Version 0.17.3 (#744)
• 31a4a56 Support async cancellations. (#726)
• 630e1e9 Bump coverage from 6.5.0 to 7.2.7 (#743)
• 2014bc8 Bump pytest from 7.3.1 to 7.4.0 (#742)
• 00717b3 Bump pytest-httpbin from 2.0.0rc1 to 2.0.0 (#740)
• 8d31f0b Graceful handling for HTTP/2 GoAway frames. (#733)
• aacdbb9 Add 'network_stream' extension to HTTP/2 connections (#729)
• eb5957d Docstrings and minor refactor for HTTP/2. (#720)
• 7548dd5 Add exceptions for invalid trace callback (#717)
• 1d90b36 Refactor test import style (#713)
• Additional commits viewable in compare view

Dependabot will resolve any conflicts with this PR as long as you don't alter it yourself. You can also trigger a rebase manually by commenting @dependabot rebase.

---

Dependabot commands and options

You can trigger Dependabot actions by commenting on this PR:

• @dependabot rebase will rebase this PR
• @dependabot recreate will recreate this PR, overwriting any edits that have been made to it
• @dependabot merge will merge this PR after your CI passes on it
• @dependabot squash and merge will squash and merge this PR after your CI passes on it
• @dependabot cancel merge will cancel a previously requested merge and block automerging
• @dependabot reopen will reopen this PR if it is closed
• @dependabot close will close this PR and stop Dependabot recreating it. You can achieve the same result by closing it manually
• @dependabot show <dependency name> ignore conditions will show all of the ignore conditions of the specified dependency
• @dependabot ignore this major version will close this PR and stop Dependabot creating any more for this major version (unless you reopen the PR or upgrade to it yourself)
• @dependabot ignore this minor version will close this PR and stop Dependabot creating any more for this minor version (unless you reopen the PR or upgrade to it yourself)
• @dependabot ignore this dependency will close this PR and stop Dependabot creating any more for this dependency (unless you reopen the PR or upgrade to it yourself)