version 2.0

This is the branch that submits to JOSS. In this branch, we perform code tests and regenerate Sphinx Documentation. Meanwhile, we update the interface for multi-fidelity samplers and single-/multi-fidelity Bayesian optimization.

version 1.0.0

The first release:

1. Design of experiments for both single- and multi-fidelity
2. Single-fidelity and multi-fidelity Gaussian process regression
3. Single-fidelity and multi-fidelity Bayesian optimization
4. Problem sets for single-fidelity and multi-fidelity