fixed typo in readme
fixed typo in readme

vertexcs-suraj/JsBarcode,web2solutions/JsBarcode,cornerbodega/JsBarcode,wavded/io-barcode,mabelticketing/JsBarcode,lemaiyan/JsBarcode,toddw/io-barcode,lindell/JsBarcode,luthfi401/JsBarcode,cornerbodega/JsBarcode,vertexcs-suraj/JsBarcode,luthfi401/JsBarcode,lemaiyan/JsBarcode,lindell/JsBarcode,web2solutions/JsBarcode,wavded/io-barcode,mabelticketing/JsBarcode,toddw/io-barcode