Adds four lifecycle hooks that can be configured to run on a per-task
basis without impacting the test timings:

- `before`: run once before iterations of the task start
- `beforeEach`: run before each iteration of the task
- `afterEach`: run after each iteration of the task
- `after`: run after all iterations finish

A contrived example:

```js
suite.add('my task', async () => {
  // the timed function
}, {
  before: () => {
    // start a server
  },
  beforeEach: () => {
    // set up some data that the timed function will mutate
  },
  afterEach: () => {
    // tear down any mutated data
  },
  after: () => {
    // stop the server
  }
})
```

This is useful if, for example, you are testing several implementations
of the same functionality and need to perform different operations on
each implementation to bring them into the same state that the timing
data from the task function is useful data.