chore(deps): bump audio_session from 0.1.16 to 0.1.18 (#1146)

Bumps [audio_session](https://github.com/ryanheise/audio_session) from 0.1.16 to 0.1.18.
- [Release notes](https://github.com/ryanheise/audio_session/releases)
- [Changelog](https://github.com/ryanheise/audio_session/blob/master/CHANGELOG.md)
- [Commits](https://github.com/ryanheise/audio_session/compare/v0.1.16...v0.1.18)

---
updated-dependencies:
- dependency-name: audio_session
  dependency-type: direct:production
  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>