Bump syn from 1.0.57 to 1.0.58 (#656)
Bump syn from 1.0.57 to 1.0.58 (#656)

Bumps [syn](https://github.com/dtolnay/syn) from 1.0.57 to 1.0.58.
- [Release notes](https://github.com/dtolnay/syn/releases)
- [Commits](https://github.com/dtolnay/syn/compare/1.0.57...1.0.58)

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

Co-authored-by: dependabot-preview[bot] <6a4c1c4838f800d1998274cd5234e1f65c55e90c@users.noreply.github.com>
xd009642/tarpaulin,xd009642/tarpaulin