Implement Encode & Decode for Wrapping<T> types

[mzachar]

Structures can clearly indicate that the value may overflow and it is intended behaviour

[VictorKoenders]

I double checked serde's implementation (which matches your implementation, so you're good) and I noticed they also implement std::cmp::Reverse<T>. This is also a simple wrapper around T. Would you mind adding that as well?

[codecov]

Codecov Report

Attention: 2 lines in your changes are missing coverage. Please review.

Comparison is base (3a638a7) 57.24% compared to head (8792100) 57.39%.

❗ Current head 8792100 differs from pull request most recent head 3847e54. Consider uploading reports for the commit 3847e54 to get more accurate results

Files	Patch %	Lines
src/de/impls.rs	50.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##            trunk     #686      +/-   ##
==========================================
+ Coverage   57.24%   57.39%   +0.15%     
==========================================
  Files          51       51              
  Lines        4350     4366      +16     
==========================================
+ Hits         2490     2506      +16     
  Misses       1860     1860              

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[mzachar]

I don't mind at all :)