install_github fails if purrr is loaded #761
Description
As purrr exports unzip, which overwrites utils::unzip. A full stack trace using bettertrace:
> install_github('rstudio/DT')
Downloading github repo rstudio/DT@master
Error in unzip(src, list = TRUE) : unused argument (list = TRUE)
In package devtools: install_github("rstudio/DT")
In package devtools: install_remotes(remotes, ...)
In package base: vapply(remotes, install_remote, ..., FUN.VALUE = logical(1))
In package devtools: FUN(X[[1L]], ...)
In package devtools: source_pkg(bundle, subdir = remote$subdir)
In package devtools: decompress(path, outdir)
In package devtools: getrootdir(as.vector(unzip(src, list = TRUE)$Name))
In package base: nchar(gsub("[^/]", "", file_list))
In package base: gsub("[^/]", "", file_list)
In package base: as.vector(unzip(src, list = TRUE)$Name)
In package purrr: unzip(src, list = TRUE)
Error: unused argument (list = TRUE)