Replace ext-iconv with symfony polyfill
Replace ext-iconv with symfony polyfill

This makes for more portable code.
jongotlin/wsdl2phpgenerator,wsdl2phpgenerator/wsdl2phpgenerator,red-led/wsdl2phpgenerator,sha1/wsdl2phpgenerator,yethee/wsdl2phpgenerator