update MapIterator __construct typehint
update MapIterator __construct typehint

postalservice14/csv,Perlkonig/grav-plugin-table-importer,mortenhauberg/csv,thephpleague/csv,HeyRatFans/csv,hmcclungiii/csv-1,Teino1978-Corp/Teino1978-Corp-csv,stof/csv,vlakarados/csv