LeonWu

WeChat introduced a [new Canvas API](https://developers.weixin.qq.com/miniprogram/dev/api/canvas/Canvas.getContext.html) after the base library `2.7.0`. Like `CanvasContext.setFillStyle` and `CanvasContext.draw` which have been deprecated in the new version, so it is compatible with these APIs...

when I ran the following code, I was surprised by the result ``` javascript const target = {} deepExtend( target, { series: [{ center: [1, 2], other: 1, dif: 2...