Add MIT licence files
diff --git a/LICENSE b/LICENSE
index 82d6089..2f19039 100644
--- a/LICENSE
+++ b/LICENSE
@@ -1,2 +1,2 @@
-YEAR: 2015-2016
-COPYRIGHT HOLDER: Hakim El Hattab and RStudio, Inc.
+YEAR: 2023
+COPYRIGHT HOLDER: revealjs R package authors