Symfony polyfill for the Iconv extension

 This component provides a native PHP implementation of the iconv functions
 (short of `ob_iconv_handler`).
 .
 The Symfony Polyfill project backports features found in the latest PHP
 versions and provides compatibility layers for some extensions and functions.
 It is intended to be used when portability across PHP versions and extensions
 is desired.
 .
 Symfony is a PHP framework, a set of tools and a development methodology.