autoSelect option is not working

[bzijlema]

Describe the bug
Disabling the autoSelect option has no effect. The documentation states that autoSelect " Automatically selects selected item on blur event (i.e. using TAB to switch to next field).". This is true, but setting autoSelect to 'false` has the same effect.

To Reproduce
Steps to reproduce the behavior:

1. Create a text input element:

<input type="text" id="foo" autocomplete="off" data-url="myurl">

2. Add autocomplete to the input and disable autoSelect:

$('#foo').autoComplete({
    autoSelect: false
});

3. Start typing until the dropdown opens.

4. Select an item from the dropdown and press Tab.

Expected behavior
The dropdown closes and the input field should not be filled with the selected autocomplete item.

Desktop:

• OS: Linux Mint 20
• Browser Chrome
• Version 86.0.4240.75