patch 8.2.1876: Vim9: argument types are not checked at compile time

Problem:    Vim9: argument types for builtin functions are not checked at
            compile time.
Solution:   Add an argument type checking mechanism. Implement type checks for
            one function.

src/version.c

@@ -750,6 +750,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1876,
 /**/
     1875,
 /**/