Add more operators

[adrhill]

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[codecov-commenter]

Codecov Report

Attention: Patch coverage is 33.33333% with 6 lines in your changes are missing coverage. Please review.

Project coverage is 66.66%. Comparing base (719b019) to head (52db645).
Report is 1 commits behind head on main.

Files	Patch %	Lines
src/conversion.jl	0.00%	3 Missing ⚠️
src/operators.jl	50.00%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main       #6      +/-   ##
==========================================
- Coverage   68.96%   66.66%   -2.30%     
==========================================
  Files           5        5              
  Lines          87       90       +3     
==========================================
  Hits           60       60              
- Misses         27       30       +3     

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