Add performance to config.toFake

Saw this was missing when reviewing DefinitelyTyped/DefinitelyTyped#56961

Bit funny that it has not been added until now, given it was added way back in #106 😄 (And later #169 #248 and others).

README.md

@@ -153,7 +153,7 @@ Installs FakeTimers using the specified config (otherwise with epoch `0` on the
 | Parameter                        | Type        | Default                                                                                                                                                                                                         | Description                                                                                                                                                                                                                                       |
 | -------------------------------- | ----------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
 | `config.now`                     | Number/Date | 0                                                                                                                                                                                                               | installs FakeTimers with the specified unix epoch                                                                                                                                                                                                 |
-| `config.toFake`                  | String[]    | ["setTimeout", "clearTimeout", "setImmediate", "clearImmediate","setInterval", "clearInterval", "Date", "requestAnimationFrame", "cancelAnimationFrame", "requestIdleCallback", "cancelIdleCallback", "hrtime"] | an array with explicit function names to hijack. _When not set, FakeTimers will automatically fake all methods **except** `nextTick`_ e.g., `FakeTimers.install({ toFake: ["setTimeout","nextTick"]})` will fake only `setTimeout` and `nextTick` |
+| `config.toFake`                  | String[]    | ["setTimeout", "clearTimeout", "setImmediate", "clearImmediate","setInterval", "clearInterval", "Date", "requestAnimationFrame", "cancelAnimationFrame", "requestIdleCallback", "cancelIdleCallback", "hrtime", "performance"] | an array with explicit function names (or objects, in the case of "performance") to hijack. _When not set, FakeTimers will automatically fake all methods **except** `nextTick`_ e.g., `FakeTimers.install({ toFake: ["setTimeout","nextTick"]})` will fake only `setTimeout` and `nextTick` |
 | `config.loopLimit`               | Number      | 1000                                                                                                                                                                                                            | the maximum number of timers that will be run when calling runAll()                                                                                                                                                                               |
 | `config.shouldAdvanceTime`       | Boolean     | false                                                                                                                                                                                                           | tells FakeTimers to increment mocked time automatically based on the real system time shift (e.g. the mocked time will be incremented by 20ms for every 20ms change in the real system time)                                                      |
 | `config.advanceTimeDelta`        | Number      | 20                                                                                                                                                                                                              | relevant only when using with `shouldAdvanceTime: true`. increment mocked time by `advanceTimeDelta` ms every `advanceTimeDelta` ms change in the real system time.                                                                               |