Adding support for coroutines

Now that the project has been created, it's time to add coroutines support. To do this, open the Project section and double-click in build.gradle for the project. It is located inside the Gradle Scripts section:

Inside this document, you will add a new variable to centralize the coroutines version. In a new line below ext.kotlin.version, add ext.coroutines_version, as shown here, for example:

buildscript {
  ext.kotlin_version = '1.2.50'
  ext.coroutines_version = '0.23.3'
  ...
}

Now you need to add the dependencies for coroutines. Append the dependency configuration in...