Fixed README.md
Fixed README.md

peakon/exceljs,guyonroche/exceljs,venkatvellaichamy/exceljs,guyonroche/exceljs,erpframework/exceljs,bchr02/exceljs,wulfsolter/exceljs,adelimon/exceljs,peakon/exceljs,qqming113/exceljs,DaSpawn/exceljs