Luis de Sousa;
Erwan Le Pennec;
Fix bug in augment() function for stm topic model.
Warn when tf-idf is negative, thanks to @EmilHvitfeldt (#112).
Switch from importing broom to importing generics, for lighter dependencies (#133).
Add functions for reordering factors (such as for ggplot2 bar plots) thanks to @tmastny (#110).
Update to tibble() where appropriate, thanks to @luisdza (#136).
Clarify documentation about impact of lowercase conversion on URLs (#139).
Change how sentiment lexicons are accessed from package (remove NRC lexicon entirely, access AFINN and Loughran lexicons via textdata package so they are no longer included in this package).