Add a few more vdiffr graphical snapshot tests (#405)

* Add a few more vdiffr graphical snapshot tests

* Update test-geom_binomdensity.R

Author: IndrajeetPatil

DESCRIPTION

@@ -109,7 +109,7 @@ Suggests:
     rlang,
     rmarkdown,
     rstanarm,
-    scales (>= 1.3.0),
+    scales (>= 1.4.0),
     splines,
     testthat (>= 3.2.1),
     tidygraph,