TS2345 issue while testing

[bartekleon]

Summary

Argument of type 'typeof Sandbox' is not assignable to parameter of type 'Constructor<Sandbox>'.
  Type 'typeof Sandbox' is not assignable to type 'void'.
(alias) class Sandbox
import Sandbox

It comes with all mocked classes in tests. I dunno if it is only in mine env (current TSlint globally and current typescript globally) - locally just forked repo

+-- stryker - current
+-- stryker-api - current