patch 8.2.1879: Vim9: argument types of insert() not checked when compiling

Problem:    Vim9: argument types of insert() not checked when compiling.
Solution:   Add argument type checks for insert().
diff --git a/src/version.c b/src/version.c
index 78e4752..a49bdd3 100644
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1879,
+/**/
     1878,
 /**/
     1877,