Upgrade the owlapi-wrapper JAR to 1.6.0

[jvendetti]

This PR upgrades to version 1.6.0 of the owlapi_wrapper.

The main feature in the new version:

Extracts class-to-class (and class-to-individual) relationships for all object properties and from a wider range of axiom shapes, so they surface in a class's property listing (the Details view).

See owlapi_wrapper PR #37 for details.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 82.03%. Comparing base (9a192c8) to head (a06e57b).
⚠️ Report is 10 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #314      +/-   ##
==========================================
+ Coverage   81.92%   82.03%   +0.11%     
==========================================
  Files         101      101              
  Lines        6853     6853              
==========================================
+ Hits         5614     5622       +8     
+ Misses       1239     1231       -8     

Flag	Coverage Δ
ag	81.87% <100.00%> (-0.05%)	⬇️
fs	81.99% <100.00%> (?)
gd	81.93% <100.00%> (?)
unittests	82.03% <100.00%> (+0.11%)	⬆️
vo	81.96% <100.00%> (?)

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