Support JUnit 5

[JeffFaer]

JUnit 5 introduces a new extension mechanism. It would be nice if there was a JukitoExtension for JUnit 5. Is there any interest in officially supporting JUnit 5?

[olafleur]

Good idea !

[tbroyer]

Fwiw, https://github.com/JeffreyFalgout/junit5-extensions/tree/master/guice-extension could likely replace JukitoRunner in many cases (haven't tried it yet though). Using a JukitoModule or TestModule would add TestScope and Mockito support, though AFAICT you'd have to call TestScope.clear() yourself and couldn't run such tests in parallel; and @All wouldn't be supported.
One could likely replace TestScope with singleton scope and not sharing injectors (the default behavior), and replace Mockito support by explicitly binding toInstance of manually-created mocks/spies.