Update composer.json
Update composer.json

Added requirements.
Thow these php extensions are supposed to be enabled by default - but ..it happens
ravisorg/html2text,mohitmayank/html2text,arthurdarcet/html2text,mohitmayank/html2text,soundasleep/html2text,ravisorg/html2text,soundasleep/html2text,utrotzek/html2text,arthurdarcet/html2text