Apply `clippy` lints, and do a `cargo update`

[Swatinem]

This is still holding off on updating the sourcemap dependency, as we would probably have to bump that in js-source-scopes first.

skip-changelog

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 74.45%. Comparing base (6a7d2de) to head (c8b24c8).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #834 +/- ## ========================================== - Coverage 74.92% 74.45% -0.47% ========================================== Files 63 63 Lines 15749 15432 -317 ========================================== - Hits 11800 11490 -310 + Misses 3949 3942 -7 ```