Bump toml from 0.5.5 to 0.5.6
Bump toml from 0.5.5 to 0.5.6

Bumps [toml](https://github.com/alexcrichton/toml-rs) from 0.5.5 to 0.5.6.
- [Release notes](https://github.com/alexcrichton/toml-rs/releases)
- [Commits](https://github.com/alexcrichton/toml-rs/compare/0.5.5...0.5.6)

Signed-off-by: dependabot-preview[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
xd009642/tarpaulin,xd009642/tarpaulin