Update forbid-prop-types.js
Update forbid-prop-types.js

handle situation where getFirstTokens() call returns only 1 Token
pwmckenna/eslint-plugin-react,lencioni/eslint-plugin-react,AlexKVal/eslint-plugin-react,mathieumg/eslint-plugin-react,yannickcr/eslint-plugin-react,petersendidit/eslint-plugin-react