Bump cargo-tarpaulin from 0.31.0 to 0.31.1

Bumps [cargo-tarpaulin](https://github.com/xd009642/tarpaulin) from 0.31.0 to 0.31.1.
- [Release notes](https://github.com/xd009642/tarpaulin/releases)
- [Changelog](https://github.com/xd009642/tarpaulin/blob/develop/CHANGELOG.md)
- [Commits](xd009642/tarpaulin@0.31.0...0.31.1)

---
updated-dependencies:
- dependency-name: cargo-tarpaulin
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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