Fix CI on trunk

[ZoeyR]

CI was currently broken for two reasons

• trunk was not compliant with the 1.41 MSRV check
• clippy had new warnings

Since bincode 2.0 is not even in alpha yet MSRV should not be locked in place. This PR removes the MSRV checks for now. Additionally the few clippy warnings have been resolved.

[codecov-commenter]

Codecov Report

Merging #408 (689787a) into trunk (8bad3bc) will decrease coverage by 0.47%.
The diff coverage is 66.66%.

@@            Coverage Diff             @@
##            trunk     #408      +/-   ##
==========================================
- Coverage   63.88%   63.41%   -0.48%     
==========================================
  Files          10       10              
  Lines         850      850              
==========================================
- Hits          543      539       -4     
- Misses        307      311       +4     

Impacted Files	Coverage Δ
src/de/read.rs	33.33% <66.66%> (ø)
src/de/mod.rs	78.31% <0.00%> (-1.21%)	⬇️
src/config/int.rs	54.28% <0.00%> (-0.96%)	⬇️

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