Need emoji support when viewing commit messages

[tommai78101]

Omitted some personal details. The top part of the image is from Bitbucket. They feature the ability to display emoji icons in the commit messages.

The red rectangle is the same message from Bitbucket, but is shown in Guitar. As you can see, the character doesn't support emoji, and thus is shown as a blank white box.

It would be nice to fix the issue where Guitar can't display emoji in the commit messages.