Keep LocalStorage

#### What are you trying to achieve?
i want keep LocalStorage like keepCookies

#### What do you get instead?

> Provide console output if related. Use `--verbose` mode for more details.

```bash
My First Test --
test something
我 在页面 "https://....com/"
我 保存屏幕截图 "see-first.jpg"
我 看到 "text"
我 等 2
我 单击 "客户/广告主", ".ant-btn"
我 wait for navigation
我 等待元素 ".right", 5
我 单击 "账号登录", ".right"
我 单击 "密码登录", ".TabR"
我 填写字段 "#Authorize_username", "...@sina.com"
我 填写字段 "#Authorize_password", "123456"
我 单击 "立即登录", ".ant-btn-primary"
我 等 5
我 保存屏幕截图 "see-chengfayun.jpg"
✔ OK in 14313ms
```

> Provide test source code if related

```js
// paste test
Feature('My First Test');

Scenario('test something', ({ I }) => {
I.amOnPage('https://....com/');
I.saveScreenshot("see-first.jpg")
I.see('text');
I.wait(2);
I.click('客户/广告主', '.ant-btn');
I.waitForNavigation();
I.waitForElement('.right', 5);
I.click('账号登录', '.right');
I.click('密码登录', '.TabR');
I.fillField('#Authorize_username', '...@sina.com');
I.fillField('#Authorize_password', '123456');
I.click('立即登录', '.ant-btn-primary');
I.wait(5)
//截图
I.saveScreenshot("see-chengfayun.jpg")
});
```

### Details

* CodeceptJS version: 3.0.7
* NodeJS Version: v14.16.1
* Operating System: macos
* puppeteer
* Configuration file:

```js
# paste config here
exports.config = {
tests: './*_test.js',
output: './output',
helpers: {
Puppeteer: {
url: 'http://localhost',
show: true,
windowSize: '1200x900',
keepBrowserState: true,
}
},
include: {
I: './steps_file.js'
},
bootstrap: null,
mocha: {},
name: 'PuppeteerTests',
translation: 'zh-CN',
plugins: {
pauseOnFail: {},
retryFailedStep: {
enabled: true
},
tryTo: {
enabled: true
},
screenshotOnFail: {
enabled: true
}
}
}
```