[BUG] Crash if commit starts with '*'

[AthAshino]

Hi,

I tried to use semantic-release-gitmoji today and had this exception:
An error occurred while running semantic-release: SyntaxError: Invalid regular expression: /^*/: Nothing to repeat
After searching a bit, I found that this commit was the source of the exception:
*Merge branch 'main' of ssh://GIT_URL into main
The problem seems to be due to the emojiRegex. The regex returns "*" which lead to a bad regex for this line:
subject = subject.replace(new RegExp('^' + gitmoji), '')

Global workflow:
const matched = emojiRegex().exec(subject) subject = *Merge branch 'main' of ssh://GIT_URL into main
if (!matched || matched.index !== 0) return null
const gitmoji = matched[0] gitmoji = *
const semver = gitmojis.find(matchEmoji(gitmoji))?.semver || 'other'
subject = subject.replace(new RegExp('^' + gitmoji), '')