unit test run and -dce full, broken - simple fix needed: @:keep

[sebpatu]

Hi,
thanks for the very usefull framework.
i tried to unit test a project in full release mode, using -dce full
but it will delete all TestSuite code.
The fix is quite simple:
please add @:keepSub at class TestSuite definition.
and add @:keep for generated file ExampleTest.hx, because each Test.hx class need to be keot also

Thanks.