v2.0.0

• Rewrite project back to vanilla-js to improve performance and reduce size.
• Pressing Enter is now the default action for adding a tag. Previously, users had to include an attribute option.
• Now pressing Backspace on a focused tag deletes it and shifts focus to the previous tag, while pressing Delete deletes the tag and moves focus to the next one.
• Fixed the tag with long text not breaking words.
• Fixed server-side validation styles.
• Fixed where adding existing values programmatically did not trigger a warning for duplicate tags.