Merge #6620

6620: cargo update (without cargo_metadata) r=kjeremy a=kjeremy

This is a `cargo update` run without updating `cargo_metadata`.

`cargo_metadata` `0.12.1` pins `semver-parser` to `0.10.0` (oli-obk/cargo_metadata@4e88e56) which brings back the compile time blowup that @matklad tried so hard to avoid in steveklabnik/semver-parser#50.

Co-authored-by: kjeremy <[email protected]>

Author: bors[bot]