Bump httpcore from 0.18.0 to 1.0.0

Bumps [httpcore](https://github.com/encode/httpcore) from 0.18.0 to 1.0.0.
- [Release notes](https://github.com/encode/httpcore/releases)
- [Changelog](https://github.com/encode/httpcore/blob/master/CHANGELOG.md)
- [Commits](encode/httpcore@0.18.0...1.0.0)

---
updated-dependencies:
- dependency-name: httpcore
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

requirements.txt

@@ -1,7 +1,7 @@
 anyio==4.0.0
 certifi==2023.7.22
 h11==0.14.0
-httpcore==0.18.0
+httpcore==1.0.0
 httpx==0.25.0
 idna==3.4
 rfc3986==1.5.0