v6.4.0

Surrogates v6.4.0

Diff since v6.3.0

Closed issues:

• MOE tests are commented out (#259)
• Setting "strict mode" in docs build throws error (#363)
• Make GEKPLS differentiable (#371)
• Add docstrings for GEKPLS functions (#373)
• [question] Reason for splitting into sub-packages (#384)

Merged pull requests:

• Make GEKPLS differentiable and surrogate optimization compatible (#381) (@vikram-s-narayan)
• Update gekpls.md for new inputs and functionality (#382) (@vikram-s-narayan)
• make docs work with strict mode (#383) (@vikram-s-narayan)
• add MOE to separate sub-package (#386) (@vikram-s-narayan)
• Speed up radial basis functions when output is single number (#392) (@fjebaker)