Enumerate additional arguments in pkg_search

[olivroy]

I don't want to commit the redoc, but somehow, the fact that pkgsearch is not needed for that function can make it useful to enumerate the two additional args from pkgsearch..

\item{...}{
Arguments passed on to \code{\link[pkgsearch:pkg_search]{pkgsearch::pkg_search}}
 \describe{
\item{\code{from}}{Where to start listing the results, for pagination.}
 \item{\code{size}}{The number of results to list.}
}}

[gaborcsardi]

Thanks!