Improve coverage of helpers and fix bugs.
Add tests for browser CookiesWrapper.
Add tests for server CookiesWrapper.
Fix jsDoc.
Fix test names.
Improve coverage of CookiesWrapper.
Add tests for server-side ModuleApiProvider.
Fix requestRefresh method. Hash is not reset again.
Add tests for browser ModuleApiProvider.
Add tests for promise adapters.
Improve coverage of EventRouter.
Improve coverage of browser ModuleLoader.
Fix bug in HTML tokenizer with buffer.
Improve test coverage for ParserDuplex and its components.
Improve test coverage for ParserDuplex and its components.
Improve test coverage for PageRenderer and its components.
Improve test coverage for StateProvider.
Improve test coverage for ModuleLoaderBase.