product.GetBoundTargets() returns empty array instead of null

[theganyo]

closes #86

[codecov]

Codecov Report

Merging #87 into master will decrease coverage by 0.21%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master      #87      +/-   ##
==========================================
- Coverage   78.73%   78.51%   -0.22%     
==========================================
  Files          16       16              
  Lines        1843     1843              
==========================================
- Hits         1451     1447       -4     
- Misses        206      208       +2     
- Partials      186      188       +2     

Impacted Files	Coverage Δ
cmd/bindings/bindings.go	74.46% <100.00%> (-1.71%)	⬇️

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[rockspore]

Just wanted to point that because len(nil) behaves as if an empty array is passed in, len instead of nil-check should almost always be used to avoid surprises.