build(deps): bump amphp/http from 1.7.1 to 1.7.3 in /test-push (#141)

Bumps [amphp/http](https://github.com/amphp/http) from 1.7.1 to 1.7.3.
- [Release notes](https://github.com/amphp/http/releases)
- [Commits](amphp/http@v1.7.1...v1.7.3)

---
updated-dependencies:
- dependency-name: amphp/http
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>