Hello! Can you add two new methods `isEmoji` and `flush`? For example: ``` stringz.isEmoji('a') // false stringz.isEmoji('➕') // true stringz.flush('a➕💪🏿🤗asd🤘🏽1231️⃣➕➖ asd') // ➕💪🏿🤗🤘🏽1️⃣➕➖ ```