Migrate to using named and solus packages.

[nekitdev]

Migrate to using named and solus packages instead of reimplementing their functionality.

[codecov]

Codecov Report

Merging #18 (7e15f77) into main (eebc4ed) will decrease coverage by 0.29%.
The diff coverage is 100.00%.

❗ Current head 7e15f77 differs from pull request most recent head f5986f7. Consider uploading reports for the commit f5986f7 to get more accurate results

@@            Coverage Diff             @@
##             main      #18      +/-   ##
==========================================
- Coverage   37.75%   37.46%   -0.30%     
==========================================
  Files           7        7              
  Lines        3814     3793      -21     
==========================================
- Hits         1440     1421      -19     
+ Misses       2374     2372       -2     

Impacted Files	Coverage Δ
iters/typing.py	92.55% <ø> (+1.37%)	⬆️
iters/async_utils.py	21.72% <100.00%> (+0.05%)	⬆️
iters/types.py	80.64% <100.00%> (-6.03%)	⬇️

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