支持AES解密

[xiashaung]

支付宝官方文档: https://docs.alipay.com/mini/introduce/aes 应用场景: https://docs.alipay.com/mini/introduce/getphonenumber

[wi1dcard]

@xiashaung 已经合并，新版本 https://github.com/wi1dcard/alipay-sdk-php/releases/tag/v1.2.0 已同步至 Packagist，欢迎更新、测试。

再次感谢您的贡献。

[coveralls]

Pull Request Test Coverage Report for Build 137

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at ?%

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Totals
Change from base Build 133:	0.0%
Covered Lines:
Relevant Lines:	0

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💛 - Coveralls