Build(deps): Bump psr/http-client from 1.0.2 to 1.0.3

Bumps [psr/http-client](https://github.com/php-fig/http-client) from 1.0.2 to 1.0.3.
- [Release notes](https://github.com/php-fig/http-client/releases)
- [Changelog](https://github.com/php-fig/http-client/blob/master/CHANGELOG.md)
- [Commits](php-fig/http-client@1.0.2...1.0.3)

---
updated-dependencies:
- dependency-name: psr/http-client
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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