v0.4.0

MLJTuning v0.4.0

Diff since v0.3.6

Note. This release does not change the API for tuning strategies.

Closed issues:

• Remove unsafe use of dictionaries in multithreaded version of tuning (#48)

Merged pull requests:

• remove unsafe use of dictionary in multithreading (#49) (@OkonSamuel)
• For a 0.4.0 release (#56) (@ablaom)
• Conconrency (#57) (@OkonSamuel)
• MLJBase 0.14 update (#58) (@ablaom)