BREAKING(v2): remove test runner; introduce test doubles

[ebebbington]

:(

Release Notes

• BREAKING: remove test runner (Rhum.testPlan, Rhum.testSuite, Rhum.testCase, and hooks)
• BREAKING: stub API (no need to stub a class to stub its members)
• feat: add Fake()
• feat: add Dummy()
• feat: Add new methods to Mock()
  • expects(...).toBeCalled(...)
  • method(...).willReturn(...)
  • method(...).wilThrow(...)
  • verifyExpectations()
• feat: pre-programmed method implementation for faking/mocking methods
  • this is used to help fakes take shortcuts
  • this is used to help mocks pre-program methods
• feat: add interfaces so that they can be returned for improved type hinting
• feat: build for cjs and es2015
• refactor: mocks to use mixin (mocks are now extensions of the class they are mocking)
• refactor: types are now stricter and provide better type hinting
• test: move integration test files into unit tests
• test: test fakes, dummies, mocks, and stubs

[crookse]

documentation donezo. please review tho: https://github.com/drashland/website-v2/pull/138

vercel: https://drash-land-git-feat-rhum-v2-docs-test-doubles-drash-land.vercel.app/rhum/v2.x/getting-started/introduction