Correctly implement DType and DType_T

[GDYendell]

No description provided.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 90.78%. Comparing base (be2f8fc) to head (5923a0e).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #285      +/-   ##
==========================================
+ Coverage   90.75%   90.78%   +0.02%     
==========================================
  Files          70       70              
  Lines        2465     2473       +8     
==========================================
+ Hits         2237     2245       +8     
  Misses        228      228              

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[shihab-dls]

Looks good! Few nits, and a type signature suggestion.

[shihab-dls]

Thanks!