patch 8.2.0764: Vim9: assigning to option not fully tested

Problem:    Vim9: assigning to option not fully tested.
Solution:   Add more test cases. Allow using any type for assignment.
diff --git a/src/vim9compile.c b/src/vim9compile.c
index 4b294df..416198a 100644
--- a/src/vim9compile.c
+++ b/src/vim9compile.c
@@ -3490,7 +3490,7 @@
 	    type_T	**typep;
 
 	    // list index: list[123]
-	    // list member: dict[key]
+	    // dict member: dict[key]
 	    // TODO: blob index
 	    // TODO: more arguments
 	    // TODO: recognize list or dict at runtime
@@ -4999,8 +4999,8 @@
 			goto theend;
 		}
 	    }
-	    else if (*p != '=' && check_type(member_type, stacktype, TRUE)
-								       == FAIL)
+	    else if (*p != '=' && need_type(stacktype, member_type, -1,
+								 cctx) == FAIL)
 		goto theend;
 	}
     }