test: re-enable cmp_tribool (fixes #15)

[reach2sayan]

cmp_tribool was disabled back in 2018 (385aae0) because it didn't compile: tribool only has an explicit operator bool, and Boost.Test's BOOST_CHECK needed an implicit one.

BOOST_CHECK(a < b);   // a < b is a tribool -> error

That went away in 2021 when the tests moved to Lightweight Test (53ba1b1). Its BOOST_TEST does (expr) ? true : false, which works fine with an explicit conversion. The test just never got turned back on, and #49 carried the commented-out line over into CMake.

So this only re-enables it in both build systems and links Boost.Logic. cmp_tribool.cpp` itself is unchanged.

Also put my full name in the CMakeLists.txt copyright line.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 81.90%. Comparing base (5f594ad) to head (20fe970).

Additional details and impacted files

@@             Coverage Diff             @@
##           develop      #50      +/-   ##
===========================================
+ Coverage    78.00%   81.90%   +3.90%     
===========================================
  Files           22       22              
  Lines          923      923              
  Branches       373      373              
===========================================
+ Hits           720      756      +36     
+ Misses         196      160      -36     
  Partials         7        7              

see 1 file with indirect coverage changes

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[reach2sayan]

@Lastique This is shouldn't be controversial and does clear an issue