Fix test

Author: otiai10

tests/utils.spec.ts

@@ -4,14 +4,14 @@ import { KCWDate } from "../src/utils";
 
 describe("format", () => {
   it("should format date correctly", () => {
-    const date = new KCWDate("August 25, 2024 07:00:00 GMT+0900");
+    const date = new KCWDate("August 25, 2024 07:00:00");
     expect(date.format("yyyy/MM/dd HH:mm:ss")).toBe("2024/08/25 07:00:00");
   });
 });
 
 describe("ETA", () => {
   it("should calculate ETA correctly", () => {
-    const date = new KCWDate("August 25, 2024 07:00:00 GMT+0900");
+    const date = new KCWDate("August 25, 2024 07:00:00");
     const eta = KCWDate.ETA(1000 * 60 * 60, date.getTime());
     expect(eta.format("yyyy/MM/dd HH:mm:ss")).toBe("2024/08/25 08:00:00");
   });