Use rlang::is_installed to avoid issues with packages that are availa…

…ble, but cannot be loaded.

R/TestDataCreators.R

@@ -9,7 +9,7 @@ test_data_package_installed <- function(outcome_type) {
     "count" = "MASS"
   )
 
-  if (!is_package_installed(data_packages[[outcome_type]])) run_test <- FALSE
+  if (!rlang::is_installed(data_packages[[outcome_type]])) run_test <- FALSE
 
   if (!run_test) {
     rlang::inform(