Support for Android Junit5

[gopidholakia]

Gordon can only support Junit4, it would be great if I get support for JUnit5 as well.

android-junit5

what I have did to have the suppoert for JUnit5 is, edit TestSuiteLoader

From
private val Annotatable.isTestMethod get() = annotationNames.any { it == "org.junit.Test" }

To
private val Annotatable.isTestMethod get() = annotationNames.any { it in setOf("org.junit.Test", "org.junit.jupiter.api.Test") }

This change is working for me, and It would be better if I get support by Gordon itself.

[joshschriever]

Closing the discussion to keep conversation on the issue #124