Liem Vo

Results 2 issues of Liem Vo

- Use compile SDK version 28 - Gradle 5.1.1 - Use new version of Kotlin Coroutine 1.2.1 - Update unit test with Spek

"Update the `build()` method in the `_SearchTabState` class." We are building the shopping cart tab so the `_ShoppingCartTabState` class, not the `_SearchTabState` class.