节点信用卡
从信用卡中验证和提取元数据。
=== 基本用法
var creditCards = require ( 'credit-cards' )
creditCards . isValid ( "4024 0071 2016 8322" )
=> true
creditCards . isValid ( "4034 0071 2016 8322" )
=> false
creditCards . getTypeCode ( "4034 0071 2016 8322" )
=> 'VI'
creditCards . getTypeName ( "4034 0071 2016 8322" )
=> 'Visa'
creditCards . getInfo ( '3478 7964 2068 802' )
=> { valid : true , code : 'AX' , name :
