Add Send+Sync to linfa-nn output

[YuhanLiin]

No description provided.

[codecov-commenter]

Codecov Report

Merging #235 (6570bb3) into master (870107f) will increase coverage by 0.02%.
The diff coverage is 66.66%.

@@            Coverage Diff             @@
##           master     #235      +/-   ##
==========================================
+ Coverage   55.37%   55.39%   +0.02%     
==========================================
  Files          96       96              
  Lines        8918     8918              
==========================================
+ Hits         4938     4940       +2     
+ Misses       3980     3978       -2     

Impacted Files	Coverage Δ
algorithms/linfa-nn/src/lib.rs	57.14% <ø> (ø)
algorithms/linfa-nn/src/linear.rs	45.16% <0.00%> (-0.30%)	⬇️
algorithms/linfa-nn/src/balltree.rs	53.96% <100.00%> (-0.37%)	⬇️
algorithms/linfa-nn/src/kdtree.rs	50.00% <100.00%> (ø)
...lgorithms/linfa-clustering/src/optics/algorithm.rs	48.53% <0.00%> (-0.29%)	⬇️
algorithms/linfa-nn/tests/nn.rs	78.04% <0.00%> (ø)
algorithms/linfa-kernel/src/lib.rs	60.21% <0.00%> (ø)
algorithms/linfa-logistic/src/lib.rs	69.55% <0.00%> (ø)
algorithms/linfa-pls/src/pls_generic.rs	69.64% <0.00%> (ø)
... and 5 more

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