Mock.toJSONSchema()

## Mock.toJSONSchema( template )
- Mock.toJSONSchema( template )

把 Mock.js 风格的数据模板 `template` 转换成 [JSON Schema](https://json-schema.org/ "JSON Schema")。

### template
必选。

表示数据模板，可以是对象或字符串。例如 `{ 'list|1-10':[{}] }`、`'@EMAIL'`。

```javascript
var template = {
    'key|1-10': '★'
}
Mock.toJSONSchema(template)
// =>
{
    "name": undefined,
    "path": [
        "ROOT"
    ],
    "type": "object",
    "template": {
        "key|1-10": "★"
    },
    "rule": {},
    "properties": [{
        "name": "key",
        "path": [
            "ROOT",
            "key"
        ],
        "type": "string",
        "template": "★",
        "rule": {
            "parameters": ["key|1-10", "key", null, "1-10", null],
            "range": ["1-10", "1", "10"],
            "min": 1,
            "max": 10,
            "count": 3,
            "decimal": undefined,
            "dmin": undefined,
            "dmax": undefined,
            "dcount": undefined
        }
    }]
}
```
```javascript
var template = {
    'list|1-10': [{}]
}
Mock.toJSONSchema(template)
// =>
{
    "name": undefined,
    "path": ["ROOT"],
    "type": "object",
    "template": {
        "list|1-10": [{}]
    },
    "rule": {},
    "properties": [{
        "name": "list",
        "path": ["ROOT", "list"],
        "type": "array",
        "template": [{}],
        "rule": {
            "parameters": ["list|1-10", "list", null, "1-10", null],
            "range": ["1-10", "1", "10"],
            "min": 1,
            "max": 10,
            "count": 6,
            "decimal": undefined,
            "dmin": undefined,
            "dmax": undefined,
            "dcount": undefined
        },
        "items": [{
            "name": 0,
            "path": ["data", "list", 0],
            "type": "object",
            "template": {},
            "rule": {},
            "properties": []
        }]
    }]
}
```