Add AutoXGB()

[jeongyoonlee]

• add automated feature selection and hyper-parameter tuning for XGBoost: model.AutoXGB()

[codecov]

Codecov Report

Merging #46 into master will increase coverage by 0.39%.
The diff coverage is 87.34%.

@@            Coverage Diff             @@
##           master      #46      +/-   ##
==========================================
+ Coverage   49.06%   49.45%   +0.39%     
==========================================
  Files          19       19              
  Lines         958     1007      +49     
==========================================
+ Hits          470      498      +28     
- Misses        488      509      +21

Impacted Files	Coverage Δ
kaggler/__init__.py	100% <100%> (ø)	⬆️
kaggler/model/__init__.py	100% <100%> (ø)	⬆️
kaggler/model/automl.py	76.79% <86.15%> (-7.88%)	⬇️
kaggler/preprocessing/categorical.py	93.99% <90.9%> (+0.13%)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update e60a740...2f0dc3e. Read the comment docs.