use generics in traits rather than 'dyn traits'

[danieleades]

No description provided.

[codecov]

Codecov Report

Attention: 46 lines in your changes are missing coverage. Please review.

Comparison is base (c4521bc) 45.55% compared to head (417e7bc) 46.26%.
Report is 1 commits behind head on main.

Files	Patch %	Lines
src/client.rs	0.00%	23 Missing ⚠️
src/client/inner/refreshable.rs	0.00%	11 Missing ⚠️
src/client/inner/quick.rs	0.00%	6 Missing ⚠️
src/endpoints/feed_items.rs	0.00%	2 Missing ⚠️
src/endpoints/transactions/get.rs	0.00%	2 Missing ⚠️
src/endpoints/transactions/list.rs	0.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #64      +/-   ##
==========================================
+ Coverage   45.55%   46.26%   +0.71%     
==========================================
  Files          19       19              
  Lines         911      897      -14     
==========================================
  Hits          415      415              
+ Misses        496      482      -14     

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