InputItem 输入框type字段，建议增加“number”

[snowdream]

• Mand Mobile Version

"mand-mobile": "^1.2.3",

• OS Version & Browser Version

macOS 10.13.4

• Node Version, Package Management Tool(such as npm/cnpm/yarn) & Version for building errors

node -v
v8.11.2

• Recurring Links

https://didi.github.io/mand-mobile/#/docs/components/form/input-item

• Recurring Steps

type | 表单类型，特殊类型自带文本格式化 text,bankCard,phone,money,password

• Expectant Behaviors

建议增加number，只能输入数字。

• Actual Behaviors

没有type为number