[useSelect] Selecting item with spacebar in firefox reopens the menu

- `downshift` version: 6.0.6
- `firefox` version: 82.0.3

**Relevant code or config**

Error present in reference implementation: https://www.downshift-js.com/use-select

**What you did**:

With firefox, open a menu and select an item with the spacebar key

**What happened**:

The item was selected, but the menu was reopened. Closely inspecting the result of onStateChange it is revelead that on key down the `__menu_keydown_space_button__` is emitted, and on key up the `__togglebutton_click__` is emitted.

Error is not present in chrome.

**Reproduction repository**:

**Problem description**:

**Suggested solution**: