fixed the header config bug of DingDing Mini-Program

fixed the header config bug of DingDing Mini-Program

remove Content-Type

Use the default configuration of the Mini-Program for Content-Type

add TouTiao Mini Program plateform support

头条小程序

fixed DingDing mini-program of bug

#4

fixed bug

fixed default method of get bug
#3

add new Feature

add retry

• Retries a function that returns a promise, leveraging the power of the retry module to the promise

add abort

• cancel request

add onProcess

• get upload and download process handle

code optimizing

remove checkStatus.js
wf.request method support the config of 'download' and 'upload'

fixed of utils variable bug

code