Update supportedLocales, improvements of Chinese

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English is not my native language; please excuse typing errors.

This config only use zh and zh-Hant in supportedLocales:

//'zh'          => ['name' => 'Chinese (Simplified)',   'script' => 'Hans', 'native' => ' 简体中文 ', 'regional' => 'zh_CN'],
//'zh-Hant'     => ['name' => 'Chinese (Traditional)',  'script' => 'Hant', 'native' => ' 繁體中文 ', 'regional' => 'zh_CN'],

Infact, the relationships of Chinese are like below:

• zh: Chinese
  • zh-Hans: Simplified Chinese
    • zh-CN: Simplified Chinese, Mainland China
    • zh-SG: Simplified Chinese, Singapore
    • zh-MY: Simplified Chinese, Malaysia
  • zh-Hant: Traditional Chinese
    • zh-TW: Traditional Chinese, Taiwan
    • zh-HK: Traditional Chinese, Hong Kong
    • zh-MO: Traditional Chinese, Macau

The first problem of this config is, 繁體中文 - Chinese (Traditional) is mainly used in Taiwan, Hong Kong and Macau, so I think regional of zh-Hant should be better changed to zh-TW.

The second problem is, currently most browsers only use zh-CN, zh-TW, zh-HK in the "Accept-Language" field.

Here are two screenshoots:

This screenshot is from Chrome, I will translate the options line by line as below:

• Chinese —— zh
• Traditional Chinese —— zh-TW
• Simplified Chinese —— zh-CN
• Chinese (Hong Kong) —— zh-HK

Firefox provides us with more opinion, I will also translate the options line by line as below:

• Chinese —— zh
• Chinese (Taiwan) —— zh-TW
• Chinese (Singapore) —— zh-SG
• Chinese (Mainland China) —— zh-CN
• Chinese (Hong Kong) —— zh-HK

Besides, the Laravel Lang project provides Chinese translation in zh-CN, zh-TW and zh-HK. When I use your project for the first time, the Accept-Language of my browser are zh-CN,zh;q=0.8,zh-TW;q=0.7,zh-HK;q=0.5,en-US;q=0.3,en;q=0.2, but the localized URL returned zh and shown English, which confused me a lot.

So, I think it's better to add zh-CN, zh-TW and zh-HK, with zh-SG and zh-MY which are listed in zh.wikipedia.org by the way. And for those who do not want to maintain the regional language, it's also necessray to keep zh-Hans and zh-Hant.