Bump simplecov-rcov from 0.2.3 to 0.3.1
Bump simplecov-rcov from 0.2.3 to 0.3.1

Bumps [simplecov-rcov](https://github.com/fguillen/simplecov-rcov) from 0.2.3 to 0.3.1.
- [Release notes](https://github.com/fguillen/simplecov-rcov/releases)
- [Commits](https://github.com/fguillen/simplecov-rcov/compare/v0.2.3...v0.3.1)

---
updated-dependencies:
- dependency-name: simplecov-rcov
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@github.com>
alphagov/content-store,alphagov/content-store