dependency address of README is confusing

README writes :
`implementation 'com.github.instacart:truetime-android:'`

but it's wrong , the right address should be :

`implementation 'com.github.instacart.truetime-android:library:'` which has a "library suffix".

and there's a RxJava extension lib:
`implementation 'com.github.instacart.truetime-android:library-extension-rx:3.5'`

I don't remember where to find this rx-extension lib, but it's not in README.