Add Matcher withTag(tagValue)

[whalemare]

Hello, thanks for your library.
Can you add function for find views by it tag, for better testing-developer experince :))

For now, if you want find view by tag you need write code like this:

val tagValue: Any = "tag"
val view = KView { withMatcher(ViewMatchers.withTagValue(Matchers.`is`(tagValue))) }  

It would be great to reduce this code to:

val tagValue: Any = "tag"
val view = KView { withTag(tagValue) }  

Thanks!

[Unlimity]

Hi there! Thanks for your request.
I will try to implement it in the following hours.
It is funny that we haven't though of porting this matcher to Kakao.

[Unlimity]

Matcher is added and already merged to master!
Happy testing!