Add additional block supports to enhance functionality

[kymberlyhaugen]

Currently, the FontAwesome block allows a user to set a color for the icon in the popup that appears after clicking the Icon Styling button in the toolbar. The user is also able to set a background color using the WordPress default block support for Color -> Background.

It would be more consistent with the WordPress editing experience for the user to set the text and background color in the same place.

If the Color -> Background support is enabled, this also allows WordPress to warn the user if the colors they have chosen would violate accessibility regulations.

May I suggest to also enable these supports as well?

• Typography -> Font Size
  This would allow users to pick the icon size in a manner consistent with the other blocks (paragraph, headings, etc).

• Shadow
  Would me most useful if the user had also chosen a background color, but would be nice to have.

• Border -> Color/Style/Width/Radius
  Allow users to add borders around the icons in a manner consistent with the other blocks that allow borders.

This these options enabled, users can further style their icons without additional wrappers and blocks.

I tested these options by using a filter to update the block supports and did not encounter any issues.