[Bug Report] v-chart 自定义渲染提示Exception: TypeError: 'caller', 'callee', and 'arguments' properties may not be accessed on strict mode functions or the arguments objects for calls to them at Function.remoteFunction (<anonymous>:2:14) at VueComponent.renderChart (webpack-internal:///679:109:13) at VueComponent.invoker

### VUX version
2.9.2

### OS/Browsers version
window7/Google Chrome版本 71.0.3578.98

### Vue version
2.5.21

### Code

```html

renderChart ({ chart }) {
var data = [{
country: '巴西',
population: 15000
}, {
country: '中国',
population: 180007
}];

chart.source(data)
chart.axis('country', {
label: null
});
chart.axis('population', {
line: null,
label: {
formatter(text, item, index) {// eslint-disable-line
return text / 1000 'M';
},
}
});

chart.legend({
position: 'right'
});

chart.coord({transposed: true});
chart.interval().position('country*population');
chart.render();

}
```

### Steps to reproduce
加载就可以

### What is Expected?
population所在的坐标轴的数值会除以1000并显示m

### What is actually happening?
没有显示