Add test case for nested object spread / methods

See microsoft#16765.

Author: Yogu

tests/cases/compiler/objectSpreadWithinMethodWithinObjectWithSpread.ts

@@ -0,0 +1,10 @@
+const obj = {};
+const a = {
+    ...obj,
+    prop() {
+        return {
+            ...obj,
+            metadata: 213
+        };
+    }
+};