adjust: in China, phone number increase very quickly.

[sunfuze]

I used this lib to validate in express, but i found 1708****484 cant be recognize as phone('zh_CN'), i checked the source code, found the limit, the regEx is:

/^(\+?0?86\-?)?((13\d|14[57]|15[^4,\D]|17[678]|18\d)\d{8}|170[059]\d{7})$/

One thing that China so different is so many consumers, so phone number increase very quickly. 170[059] is not engouh. The best way is no limit in tail 8 numbers, like old code done.The old is:

/^(\+?0?86\-?)?1[345789]\d{9}$/

[coveralls]

Coverage remained the same at 99.087% when pulling c1fcbb6 on sunfuze:adjust/phone-zh_CN into 449bbbf on chriso:master.

[chriso]

Thanks.