Use proper IDS CD default palette and bump to v0.3.0

Thanks @Sascha!

Change-Id: If0ba7262141dbf0b257dbc3288a615bca4c70455
diff --git a/DESCRIPTION b/DESCRIPTION
index 679e432..94b1929 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -1,7 +1,7 @@
 Package: idsThemeR
 Type: Package
 Title: Plot themes for the Leibniz Institute for the German Language (IDS)
-Version: 0.2.0
+Version: 0.3.0
 Authors@R:
     c(person(given = "Marc",
              family = "Kupietz",