小程序增加图像处理相关接口

https://developers.weixin.qq.com/miniprogram/dev/api-backend/open-api/img/img.aiCrop.html

https://developers.weixin.qq.com/miniprogram/dev/api-backend/open-api/img/img.scanQRCode.html

https://developers.weixin.qq.com/miniprogram/dev/api-backend/open-api/img/img.superresolution.html