version 3.1

New features

preliminary integration of code from SCnext/mixedSCGLR written by Jocelyn Chauvet (issue #11)
moved parallelization to future framework. Need future.apply package (issue #16)
added progress to scglrCrossVal and scglrThemeBackward functions using progressr package (issue #17)

parameter nfolds of scglrCrossVal as been renamed to folds and now accepts also vectors. For now a warning is issued and provided value is used but update your code as it will likely be removed in a future version.
parameter mc.cores of scglrCrossVal is now deprecated as of the move to future framework for parallelization.

fix bug happening when providing a single Y variable to sglrTheme (issue #1)
allow to provide folds for cross validation defined by user (issue #2)
individual beta and gamma for themes were not properly computed (issue #5)
improve evaluation of linear predictors in theme function (issue #8)
remove dependency on expm package (issue #10)
error message for lack of convergence were improved and scglrCrossVal no longer stops when a fold does not converge (issue #12)
add a plot for scglrCrossVal
fix contrasts error in scglrTheme (issue #20)
fix some URL in docs
move from plsdepot::plsreg2 to pls::plsr to initialize mixed model components (issue #22)
fix rstudio bug displaying error message when printing a MultivariateFormula (in fact a Formula) (issue #23).

This major version introduces a new feature allowing to group covariates in so called themes.

New method is available : SR (Structural Relevance) see vignette
Major rewrite of plot styling (not backward compatible)
Various fixes and improvements (especially when dealing with a single dependant variable)

Initial version of SCGLR