update clippy linting

[danieleades]

this is stacked on #242

[codecov]

Codecov Report

Base: 78.60% // Head: 78.70% // Increases project coverage by +0.09% 🎉

Coverage data is based on head (e06183a) compared to base (8ca80dd).
Patch coverage: 100.00% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #243      +/-   ##
==========================================
+ Coverage   78.60%   78.70%   +0.09%     
==========================================
  Files          18       18              
  Lines         589      587       -2     
==========================================
- Hits          463      462       -1     
+ Misses        126      125       -1     

Impacted Files	Coverage Δ
eventually/src/aggregate.rs	90.32% <ø> (ø)
eventually-postgres/src/aggregate.rs	79.22% <100.00%> (+1.01%)	⬆️
eventually-postgres/src/event.rs	80.18% <100.00%> (-0.18%)	⬇️
eventually-postgres/tests/event_store.rs	97.75% <0.00%> (ø)

Help us with your feedback. Take ten seconds to tell us how you rate us. Have a feature suggestion? Share it here.

☔ View full report at Codecov.
📢 Do you have feedback about the report comment? Let us know in this issue.