fix a bug causing issues in tables' cran check
diff --git a/R/zzz.R b/R/zzz.R
index 36133e7..c12793b 100644
--- a/R/zzz.R
+++ b/R/zzz.R
@@ -15,7 +15,7 @@
       usepackage_latex("threeparttablex")
       usepackage_latex("ulem", "normalem")
       usepackage_latex("makecell")
-      # usepackage_latex("xcolor")
+      usepackage_latex("xcolor")
     }
   }
   auto_format <- getOption("kableExtra.auto_format", default = TRUE)