add pkgbuild as new Suggested package

JanCaha · web-flow · commit f49445b74351 · 2018-12-23T13:00:12.000+01:00
diff --git a/DESCRIPTION b/DESCRIPTION
@@ -57,6 +57,7 @@ Suggests:
     plyr,
     ggplot2,
     sp,
-    tools
+    tools,
+    pkgbuild
 License: GPL-2
 RoxygenNote: 6.1.0
