sjlabelled: Labelled Data Utility Functions

General

• get_dv_labels() and get_term_labels() now support clmm-objects (package ordinal) and stanmvreg-objects (package rstanarm).
• read_spss() gets a enc-argument for character encoding, which is now supported since haven 1.1.2.
• get_term_labels() now returns NULL for unsupported models, instead of giving an error.
• get_dv_labels() now returns a default string for unsupported models, instead of giving an error.