patch 8.2.3179: Vim9: cannot assign to an imported variable at script level

Problem:    Vim9: cannot assign to an imported variable at script level.
Solution:   Lookup imported items when assigning.

src/version.c

@@ -755,6 +755,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    3179,
 /**/
     3178,
 /**/