v0.2.0

What's Changed

• Version 0.2.0 by @tohtsky in #89
• Drop Python3.6 support & Fix test by @tohtsky in #90

Full Changelog: v0.1.20...v0.2.0

Breaking Changes

• iALS's confidence parameter alpha is now reparametrized by alpha0 = 1 / alpha (roughtly) following "Revisiting the Performance of iALS on Item Recommendation Benchmarks"
• Dropped the user cold start module.