impl Error

[ltitanb]

implement Display and Error to make it more ergonomic for library users

[codecov]

Codecov Report

❌ Patch coverage is 6.66667% with 14 lines in your changes missing coverage. Please review.
✅ Project coverage is 55.73%. Comparing base (3f3d7de) to head (99e4070).
⚠️ Report is 3 commits behind head on main.

Files with missing lines	Patch %	Lines
src/lib.rs	6.66%	14 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #56      +/-   ##
==========================================
- Coverage   58.62%   55.73%   -2.89%     
==========================================
  Files           8        9       +1     
  Lines         290      305      +15     
==========================================
  Hits          170      170              
- Misses        120      135      +15     

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[michaelsproul]

This is a breaking change, so we can include it in 0.13