Add types TropicalMaxMin and TropicalBitwise.

[samuelsonric]

I have added two tropical number types.

• TropicalMaxMin: this is sometimes called the bottleneck semiring
• TropicalBitwise: this generalizes TropicalAndOr

I also flipped the ordering of TropicalMinPlus.

[GiggleLiu]

LGTM. Please also change the README to reflect the added semiring types.

[codecov]

Codecov Report

❌ Patch coverage is 89.65517% with 9 lines in your changes missing coverage. Please review.
✅ Project coverage is 86.69%. Comparing base (3db3389) to head (75324a7).
⚠️ Report is 6 commits behind head on master.

Files with missing lines	Patch %	Lines
src/tropical_bitwise.jl	84.61%	6 Missing ⚠️
src/tropical_maxmin.jl	93.10%	2 Missing ⚠️
src/TropicalNumbers.jl	85.71%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master      #16      +/-   ##
==========================================
+ Coverage   86.16%   86.69%   +0.53%     
==========================================
  Files           6        8       +2     
  Lines         159      233      +74     
==========================================
+ Hits          137      202      +65     
- Misses         22       31       +9     

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[GiggleLiu]

I found a long debate about the meaning of isless, <, cmp here: https://discourse.julialang.org/t/meaning-of-isless-cmp-isequal-total-order-partial-order-unordered/8176/20

I was just wondering why I added so many functions for comparison. It seems there is no easy way to define comparison with single API.

[GiggleLiu]

To speed up the pipeline, I made some minor fixes to documentation and tests and merged the PR.

[samuelsonric]

Hi @GiggleLiu, thank you for updating the documentation for me. It hadn't occurred to me to do that!