Add compatibility with LossFunctions.jl, test with least squares

[alexmul1114]

Issue #10

[codecov]

Codecov Report

All modified lines are covered by tests ✅

Comparison is base (e31ed21) 100.00% compared to head (3ca2ec5) 100.00%.
Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff            @@
##            master       #11   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files            3         4    +1     
  Lines           68        70    +2     
=========================================
+ Hits            68        70    +2     

Files	Coverage Δ
ext/LossFunctionsExt.jl	100.00% <100.00%> (ø)
src/GCPDecompositions.jl	100.00% <ø> (ø)

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[dahong67]

Looking good!

I think we should put this functionality in a package extension: https://pkgdocs.julialang.org/v1/creating-packages/#Conditional-loading-of-code-in-packages-(Extensions)

For backwards compatibility, let's take this approach for now: https://pkgdocs.julialang.org/v1/creating-packages/#Transition-from-normal-dependency-to-extension

Could you try getting that to work?

[dahong67]

Great job! 🎊