patch 8.2.1956: Vim9: cannot specify argument types for lambda

Problem:    Vim9: cannot specify argument types for lambda.
Solution:   Allow adding argument types.  Check arguments when calling a
            function reference.
diff --git a/src/version.c b/src/version.c
index d4cddb8..4c8579a 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1956,
+/**/
     1955,
 /**/
     1954,