decrease ggplot2 base_size from 12 to 10

Change-Id: I63eae80887c7cea54a0ae0c568427b371f31e26a
diff --git a/man/theme_ids.Rd b/man/theme_ids.Rd
index 8ce9941..e49f73d 100644
--- a/man/theme_ids.Rd
+++ b/man/theme_ids.Rd
@@ -5,7 +5,7 @@
 \title{IDS Theme for ggplot2}
 \usage{
 theme_ids(
-  base_size = 12,
+  base_size = 10,
   base_family = idsBaseFontFamily,
   style = c("default", "light", "dark"),
   bgcolor = NULL