patch 8.2.3979: Vim9: the feature is not mentioned in the right places

Problem:    Vim9: the feature is not mentioned in the right places.
Solution:   Add +vim9script to the help and :version output.
diff --git a/src/version.c b/src/version.c
index ff84274..8f47ebb 100644
--- a/src/version.c
+++ b/src/version.c
@@ -661,14 +661,15 @@
 	"-vartabs",
 #endif
 	"+vertsplit",
-	"+virtualedit",
-	"+visual",
-	"+visualextra",
+	"+vim9script",
 #ifdef FEAT_VIMINFO
 	"+viminfo",
 #else
 	"-viminfo",
 #endif
+	"+virtualedit",
+	"+visual",
+	"+visualextra",
 	"+vreplace",
 #ifdef MSWIN
 # ifdef FEAT_VTP
@@ -750,6 +751,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    3979,
+/**/
     3978,
 /**/
     3977,