patch 8.0.0682: no test for synIDtrans()

Problem:    No test for synIDtrans().
Solution:   Add a test. (Dominique Pelle, closes #1796)
diff --git a/src/version.c b/src/version.c
index b06f938..c1d5ec8 100644
--- a/src/version.c
+++ b/src/version.c
@@ -765,6 +765,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    682,
+/**/
     681,
 /**/
     680,