patch 8.2.1137: Vim9: modifiers not cleared after compiling function

Problem:    Vim9: modifiers not cleared after compiling function.
Solution:   Clear command modifiers. (closes #6396)

src/version.c

@@ -754,6 +754,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1137,
 /**/
     1136,
 /**/