Bump git2 from 0.13.19 to 0.13.20 (#766)
Bump git2 from 0.13.19 to 0.13.20 (#766)

Bumps [git2](https://github.com/rust-lang/git2-rs) from 0.13.19 to 0.13.20.
- [Release notes](https://github.com/rust-lang/git2-rs/releases)
- [Commits](https://github.com/rust-lang/git2-rs/compare/0.13.19...0.13.20)

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

Co-authored-by: dependabot[bot] <1c358da00a777d4e9898c1280ab801e2df165188@users.noreply.github.com>
xd009642/tarpaulin,xd009642/tarpaulin