0.28.0

rumale-tree

Breaking change

• Rewrite native exntension codes with C++.
• Reimplements stop_growing? private method in DecisionTreeRegressor with native extension.

rumae-neural_network

• Add classifier and regressor classes for Radial Basis Function (RBF) Network.
  • RBFClassifier
  • RBFRegressor
• Add classifier and regressor classes for Random Vector Functinal Link (RVFL) Network.
  • RVFLClassifier
  • RVFLRegressor

others

• No changes, minor changes in configuration files, or minor refactoring using RuboCop.