Xopt v1.3.0

What's Changed

• fast forward main changes by @roussel-ryan in #95
• add documentation re algorithms by @roussel-ryan in #99
• Fix constants in neldermean by @ChristopherMayes in #100
• RCDS generator by @wenatuhs in #84
• ff by @roussel-ryan in #101
• Modeling updates by @roussel-ryan in #98
• implementing trust region BO by @roussel-ryan in #102
• update multi-fidelity branch with modeling improvements by @roussel-ryan in #103
• Multi fidelity Bayesian optimization with MOMF by @roussel-ryan in #104
• Model serialization by @roussel-ryan in #105

Full Changelog: v1.2.6...v1.3.0