Do a `cargo update` and fix a bunch of lints

[Swatinem]

skip-changelog

[codecov[bot]]

Codecov Report

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

Comparison is base (d341282) 74.89% compared to head (9e81643) 74.92%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #829 +/- ## ========================================== + Coverage 74.89% 74.92% +0.02% ========================================== Files 63 63 Lines 15745 15749 +4 ========================================== + Hits 11793 11800 +7 + Misses 3952 3949 -3 ```