Describe the bug

By default a checkbox is only submitted in the form when its checked and then it sends the given value. I expected the unchecked-value setting to then dynamically the value but always send the checkbox as if it as checked.

Steps to reproduce the bug

<b-form-checkbox
    v-else
    switch
    v-model="checked"
    value="1"
    unchecked-value="0"
    name="mycheckbox"
>
    foo
</b-form-checkbox>

Expected behavior

mycheckbox is either 0 (unchecked) or 1 (checked) after submission

Actual behavior

mycheckbox is 1 (checked) after submission or not set at all (unchecked)

Versions

Libraries:

• BootstrapVue: 2.0.0
• Bootstrap: 4.3.1
• Vue: 2.6.10

Environment:

• Device: Laptop
• OS: Linux
• Browser: Brave
• Version: [e.g. 70]

Demo link

Additional context

Add any other context about the bug here.