Allow custom advanceTimers implementation and update tick to microtask based approach

[OiNutter]

Issue

Fixes #215.

Details

As discussed in original issue allow providing custom advanceTimers implementation to virtual.start() which can then be provided to the internal userEvent usage. To allow this the userEvent usages have been updated to use a shared session created via userEvent.setup. This will also ensure the defaultUserEventOptions are actually applied as expected as v14 of @testing-library/user-event doesn't support passing the options as a second parameter.

Additionally updated the tick helper to use Promise.resolve rather than a setTimeout approach to reduce impact of using fake timers.

Verified existing tests pass and added new tests to ensure custom advanceTimers is called

CheckList

• Has been tested (where required).