FEAT PuffinnLSH

[VarIr]

Due to upstream improvements in puffinn, should now work on MacOS.
Also, the num_threads argument has been removed from Index.rebuild().

[codecov-io]

Codecov Report

❗ No coverage uploaded for pull request base (develop@0e1d230). Click here to learn what that means.
The diff coverage is 69.04%.

@@            Coverage Diff             @@
##             develop      #45   +/-   ##
==========================================
  Coverage           ?   98.59%           
==========================================
  Files              ?       54           
  Lines              ?     4428           
  Branches           ?      493           
==========================================
  Hits               ?     4366           
  Misses             ?       37           
  Partials           ?       25

Impacted Files	Coverage Δ
skhubness/utils/platform.py	55.55% <0%> (ø)
skhubness/neighbors/tests/test_lof.py	98.03% <100%> (ø)
skhubness/neighbors/base.py	95.37% <100%> (ø)
skhubness/neighbors/tests/test_lsh.py	96.42% <100%> (ø)
skhubness/neighbors/tests/test_neighbors.py	99.68% <100%> (ø)
skhubness/neighbors/lsh.py	92.57% <62.96%> (ø)

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[VarIr]

Closes #36