refactor: trackStyle & handleStyle & railStyle

[paranoidjk]

ref #255 (comment)

@silentcloud @benjycui

Take a look at new api propose.

• The minimumTrackStyle and maximumTrackStyle will be deprecate at rc-slider@9.x. But will remain at this 8.x minor version upgrade, since wait toantd@3.x and antd-mobile@2.x major version is too late.
• suggest use handleStyle, trackStyle , railStyle to custom style

@silentcloud Let me konw whether this will have influence to tiny-app.

Name	Type	Default	Description
minimumTrackStyle	Object		please use trackStyle instead. (only used for slider, just for compatibility , will be deprecate at rc-slider@9.x )
maximumTrackStyle	Object		please use railStyle instead (only used for slider, just for compatibility , will be deprecate at rc-slider@9.x)
handleStyle	Array[Object] | Object	[{}]	The style used for handle. (both for slider(Object) and range(Array of Object), the array will be used for mutli handle follow element order)
trackStyle	Array[Object] | Object	[{}]	The style used for track. (both for slider(Object) and range(Array of Object), the array will be used for mutli track follow element order)
railStyle	Object	{}	The style used for the track base color.

[coveralls]

Coverage remained the same at 48.98% when pulling 02f0a07 on custom-style into 453cb60 on master.

[silentcloud]

@paranoidjk 没问题，你发了之后，我在 tiny 里按照新 api 改一下即可

[coveralls]

Coverage remained the same at 48.98% when pulling 257ab97 on custom-style into 453cb60 on master.

[coveralls]

Coverage remained the same at 48.98% when pulling a50de57 on custom-style into 453cb60 on master.

[benjycui]

@paranoidjk 没问题，你发了之后，我在 tiny 里按照新 api 改一下即可

这个给我练手吧，只改 web？还是说 web 和 native 都要？

[silentcloud]

@benjycui native 不用改，只用改 web

[paranoidjk]

@benjycui tiny-app is based on antd-mobile components, so you need upgrade antd-mobile to a beta version with rc-slider@8.1.0 first.

[paranoidjk]

@benjycui @silentcloud antd-mobile 改完了 ant-design/ant-design-mobile@a83d0fe