Re-order aliases to match roxygen2 output

[MichaelChirico]

Another no-op diff to reduce the diff in #61

Script for helping here:

library(tools)
aliases_on_branch = function(branch) {
  system(paste('git checkout', branch))
  rd = Sys.glob("man/*.Rd")
  lapply(rd, \(f) unlist(Filter(\(e) attr(e, "Rd_tag") == "\\alias", parse_Rd(f))))
}

old = aliases_on_branch("master")
new = aliases_on_branch("roxygen")

all.equal(old, new)