patch 8.2.0677: Vim9: no support for closures

Problem:    Vim9: no support for closures.
Solution:   Find variables in the outer function scope, so long as the scope
            exists.
diff --git a/src/version.c b/src/version.c
index e23e503..8f1539a 100644
--- a/src/version.c
+++ b/src/version.c
@@ -747,6 +747,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    677,
+/**/
     676,
 /**/
     675,