2.0.0

Major release of the Surrogate Modeling Toolbox with handling of hierarchical and mixed variables for kriging-based surrogates.

See SMT 2.0 article (preprint).

Special thanks to @Paul-Saves for his essential contributions and @jbussemaker for his work on the API and many thanks to all contributors.

• No API breaking change since 2.0b3
• Add decoding values method for design vectors (@jbussemaker #435 )
• Now numba is opt-in: user has to set USE_NUMBA_JIT=1 once numba is installed (@Paul-Saves #443 )
• Speed up of EGO algorithm (@Paul-Saves #445 )
• Update tutorial notebooks (@NatOnera #436, #448 )