Bump structlog from 18.2.0 to 19.1.0 (#5382)
Bump structlog from 18.2.0 to 19.1.0 (#5382)

Bumps [structlog](https://github.com/hynek/structlog) from 18.2.0 to 19.1.0.
- [Release notes](https://github.com/hynek/structlog/releases)
- [Changelog](https://github.com/hynek/structlog/blob/master/CHANGELOG.rst)
- [Commits](https://github.com/hynek/structlog/compare/18.2.0...19.1.0)

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
pypa/warehouse,pypa/warehouse,pypa/warehouse,pypa/warehouse