Bump cattrs from 1.1.2 to 1.7.1
Bump cattrs from 1.1.2 to 1.7.1

Bumps [cattrs](https://github.com/Tinche/cattrs) from 1.1.2 to 1.7.1.
- [Release notes](https://github.com/Tinche/cattrs/releases)
- [Changelog](https://github.com/Tinche/cattrs/blob/master/HISTORY.rst)
- [Commits](https://github.com/Tinche/cattrs/commits)

---
updated-dependencies:
- dependency-name: cattrs
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@github.com>
burningmantech/ranger-ims-server,burningmantech/ranger-ims-server,burningmantech/ranger-ims-server,burningmantech/ranger-ims-server