[Bug] Promts with multiselect malfunction

When new `keybindings` registered by user, promts with `multiselect=False` can be multiselected.

```
from InquirerPy import inquirer

keybindings={"toggle-all": [{"key": ["c-a", "tab"]}]}
result = inquirer.select(message="Select:", choices=[1, 2, 3], keybindings=keybindings).execute()
```