Add contributors

Added @higgi13425  as a contributor for his much needed documentation editing!
diff --git a/DESCRIPTION b/DESCRIPTION
index 0e2c4cd..5bf0181 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -3,6 +3,14 @@
 Version: 0.1.1
 Author: Brent Thorne
 Description: Posterdown expands on RMarkdown to generate PDF conference posters.
+Authors@R: c(
+    person("Brent", "Thorne",
+           email = "brent.thorne18@gmail.com", 
+           role = c("aut", "cre"), 
+           comment = c(ORCID = "0000-0002-1099-3857")
+    ),
+    person("Peter", "Higgins", role = "ctb")
+  )
 Maintainer: Brent Thorne <brent.thorne18@gmail.com>
 License: MIT + file LICENSE
 Encoding: UTF-8