Bump fixtures from 3.0.0 to 4.0.0
Bump fixtures from 3.0.0 to 4.0.0

Bumps [fixtures](https://github.com/testing-cabal/fixtures) from 3.0.0 to 4.0.0.
- [Release notes](https://github.com/testing-cabal/fixtures/releases)
- [Changelog](https://github.com/testing-cabal/fixtures/blob/master/NEWS)
- [Commits](https://github.com/testing-cabal/fixtures/compare/3.0.0...4.0.0)

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

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@github.com>
snarfed/oauth-dropins,snarfed/oauth-dropins,snarfed/oauth-dropins