stdmod 0.1.7.4

(All major changes after 0.1.7.1)

Fixed a bug in plotmod(). It now correctly handles more than two levels when w_method is set to"percentile". (0.1.7.2, 0.1.7.3)
Fixed a typo in DESCRIPTION. (0.1.7.4)

stdmod 0.1.7.1

(All major changes after 0.1.5)

Added plotmod() for plotting moderation effects. This function will check whether a variable is standardized. If yes, will note this in the plot.
plotmod() can also plot a Tumble graph (Bodner, 2016) if graph_type is set to "tumble".
Updated vignettes to use plotmod() instead of visreg::visreg().
Added cond_effect() for computing conditional effects. This function will check which variable(s) is/are standardized. If yes, will note this in the printout.
Added cond_effect_boot(), a wrapper of cond_effect() that can form nonparametric bootstrap confidence intervals for the conditional effects, which may be partially or completely standardized.
Updated the print method for the summary of std_selected() and std_selected_boot().
Added more vignettes to introduce the new functions.
stdmod_lavaan() now returns an object of the class stdmod_lavaan, with methods print, confint, and coef added.

Changed the column order of the coefficient table in std_selected_boot() output. Bootstrap confidence intervals are placed next to parameter estimates.
Added vcov() method for std_selected() output. If bootstrapping is used, it can return the variance-covariance matrix of the bootstrap estimates.
Added confint() method for std_selected() output. If bootstrapping is used, it can return the bootstrap percentile confidence intervals if requested.
Other minor fixes.