Adding Memoize v1

tests/decorators/memoize.spec.ts

@@ -0,0 +1,22 @@
+import 'reflect-metadata';
+import { Serde } from "src/serde";
+import { Memoize } from 'src/decorators';
+
+class MemoizeTestModel extends Serde<MemoizeTestModel> {
+    name: string;
+    @Memoize() doNameRandom(): string {
+        return this.name + (Math.random() * 10);
+    }
+}
+
+describe('@Memoize() Decorator', () => {
+    it('should remember...', () => {
+        const testModel = new MemoizeTestModel().deserialize({
+            name: 'test model',
+        });
+    
+        const result1 = testModel.doNameRandom();
+        const result2 = testModel.doNameRandom();
+        expect(result1).toBe(result2);
+    });
+});