Bump backoff from 1.11.1 to 2.2.1 (#185)

Bumps [backoff](https://github.com/litl/backoff) from 1.11.1 to 2.2.1.
- [Release notes](https://github.com/litl/backoff/releases)
- [Changelog](https://github.com/litl/backoff/blob/master/CHANGELOG.md)
- [Commits](litl/backoff@v1.11.1...v2.2.1)

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

Signed-off-by: dependabot[bot] <support@github.com>

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

requirements_test.txt

@@ -2,4 +2,4 @@ pytest~=7.1
 pytest-homeassistant-custom-component==0.12.18
 
 # Component dependencies
-backoff==1.11.1
+backoff==2.2.1