A file on the specified out.dir containing the package references
in BibTeX format. If assigned a name, get_citations will also return a list
with citation keys for each citation (without @).
Arguments
pkgs
Character vector of package names, e.g. obtained by scan_packages().
out.dir
Directory to save the output document and a BibTeX file with
the references. It is recommended to set out.dir = getwd().
bib.file
Desired name for the BibTeX file containing packages references
("grateful-refs" by default).
include.RStudio
Logical. If TRUE, adds a citation for the
current version of RStudio.