fix(closeButton): prevent cross button to be an emoji
fix(closeButton): prevent cross button to be an emoji

fixes #259 

This is happening, since the "heavy cross" is an emoji on iOS, and thus won't accept any styling. The text version, with the u+FEOE character after it (VS15), as mentioned in https://www.unicode.org/Public/UCD/latest/ucd/StandardizedVariants.txt
fkhadra/react-toastify,fkhadra/react-toastify,sniphpet/react-toastify,fkhadra/react-toastify,sniphpet/react-toastify,fkhadra/react-toastify