v1.4.2

MendelIHT v1.4.2

Diff since v1.4.0

Closed issues:

• parallel computing in cv_iht is slow for floating point matrices. (#8)
• Do not perform selection on non-genetic covariates (#37)

Merged pull requests:

• Multithread instead of pmap (#35) (@biona001)
• compat upate (#38) (@kose-y)
• Project covariates (#39) (@biona001)