[Feat] Test reporting

[bobbyjnichols]

For better integration into CI tools, it would be helpful to have some form of structured test reporting. JUnit is a popular choice for this and is supported by many CI suites. Any thoughts on adding JUnit as a renderer?

[bobbyjnichols]

#538 I've created this PR as a proposal to possibly add JUnit support. Running trial with the example project seems to produce good results!