Use rlang to generate quosure list (tidyverse#3842)

Avoids making assumptions about internals of quosure lists

Author: lionel-

tests/testthat/helper-facet.r

@@ -1,6 +1,4 @@
 
 quos_list <- function(...) {
-  x <- list(...)
-  names(x) <- names2(x)
-  structure(x, class = "quosures")
+  new_quosures(list(...))
 }