Update composer.json
Update composer.json

Update phpspreadsheet dependency
forelo/cosnics,cosnics/cosnics,forelo/cosnics,cosnics/cosnics,forelo/cosnics,cosnics/cosnics,cosnics/cosnics,forelo/cosnics,forelo/cosnics,forelo/cosnics,forelo/cosnics,cosnics/cosnics,forelo/cosnics,cosnics/cosnics,cosnics/cosnics,cosnics/cosnics