chore(deps-dev): bump aioresponses from 0.7.6 to 0.7.8 (#944)

Bumps [aioresponses](https://github.com/pnuckowski/aioresponses) from 0.7.6 to 0.7.8.
- [Release notes](https://github.com/pnuckowski/aioresponses/releases)
- [Commits](pnuckowski/aioresponses@0.7.6...0.7.8)

---
updated-dependencies:
- dependency-name: aioresponses
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]