- Sets NULL as the default argument for additional regressors (#23, @MatthieuStigler)
- Updated maintainer's email
- Avoids 1:NROW() and uses seq_len() instead
- Corrects CRAN warnings in DESCRIPTION
- Added a
NEWS.md
file to track changes to the package. - Fixes warnings about "The
add
argument ofgroup_by()
is deprecated as of dplyr 1.0.0."