Safer HSP Heuristics

[guilyx]

Delete Relaxation heuristics now can be tried on any domain. Failure to compute H will not create a breach in the code.

Closes #82

[codecov]

Codecov Report

Merging #83 (8e2d2eb) into main (42f18d0) will increase coverage by 4.52%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main      #83      +/-   ##
==========================================
+ Coverage   88.95%   93.47%   +4.52%     
==========================================
  Files          16       17       +1     
  Lines         878      966      +88     
==========================================
+ Hits          781      903     +122     
+ Misses         97       63      -34     

Impacted Files	Coverage Δ
jupyddl/automated_planner.py	94.44% <100.00%> (+15.59%)	⬆️
jupyddl/heuristics.py	90.69% <100.00%> (+0.10%)	⬆️
tests/test_automated_planner.py	100.00% <100.00%> (ø)
tests/test_basic_astar.py	100.00% <100.00%> (ø)
tests/test_basic_search.py	100.00% <100.00%> (ø)
tests/test_heuristics.py	100.00% <100.00%> (ø)
tests/test_hsp_astar.py	100.00% <100.00%> (ø)
tests/test_node.py	100.00% <100.00%> (ø)
... and 6 more

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