Allow passing isDisabled to individual button group button

[cchaos]

Fixes #1423

via

this.toggleButtons = [{
      id: `${idPrefix}0`,
      label: 'Option one',
      isDisabled: true,
    }, {
      id: `${idPrefix}1`,
      label: 'Option two is selected by default',
    }, {
      id: `${idPrefix}2`,
      label: 'Option three',
    }];

Checklist

• [ ] This was checked in mobile
• [ ] This was checked in IE11
• [ ] This was checked in dark mode
• [ ] Any props added have proper autodocs
• [ ] Documentation examples were added
• A changelog entry exists and is marked appropriately
• [ ] This was checked for breaking changes and labeled appropriately
• [ ] Jest tests were updated or added to match the most common scenarios
• [ ] This was checked against keyboard-only and screenreader scenarios
• [ ] This required updates to Framer X components

[legrego]

Wow that was fast, thanks! I was going to tackle this tomorrow morning :)

Should we also update the prop types for options?

[cchaos]

Yeah it isn't required and feels inherit, but we may as well be explicit. I'll add it.

[legrego]

LGTM pending merge conflict on the CHANGELOG. Thanks!