Rollup merge of rust-lang#86159 - ehuss:update-cargo, r=ehuss

Update cargo

11 commits in 0cecbd67323ca14a7eb6505900d0d7307b00355b..aa8b09297bb3156b849e73db48af4cd050492fe6
2021-06-01 20:09:13 +0000 to 2021-06-09 00:28:53 +0000
- Add `--prune` option for cargo-tree (rust-lang/cargo#9520)
- Fix typo in gitignore docs. (rust-lang/cargo#9556)
- Fix typos in command_prelude.rs (rust-lang/cargo#9552)
- Make clippy happy (rust-lang/cargo#9551)
- Remove some dead code. (rust-lang/cargo#9546)
- Add additional test for CJK progress width (rust-lang/cargo#9515)
- Pull in semver 1.0.3 'x' fix (rust-lang/cargo#9544)
- Add some tracking issues to unstable docs. (rust-lang/cargo#9540)
- Update documentation for include/exclude. (rust-lang/cargo#9538)
- Bump mdbook version for contrib guide. (rust-lang/cargo#9534)
- Replace deprecated `[replace]` references with `[patch]` (rust-lang/cargo#9533)