patch 8.2.0084: complete item "user_data" can only be a string

Problem:    Complete item "user_data" can only be a string.
Solution:   Accept any type of variable. (closes #5412)
diff --git a/src/version.c b/src/version.c
index 3c8feee..6b2c9c8 100644
--- a/src/version.c
+++ b/src/version.c
@@ -743,6 +743,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    84,
+/**/
     83,
 /**/
     82,