chore(package): update pdfjs-dist to version 1.6.226
chore(package): update pdfjs-dist to version 1.6.226

https://greenkeeper.io/
MrRio/jsPDF,jutunen/jsPDF-table_2,SpatialVision/jsPDF,yWorks/jsPDF,yWorks/jsPDF,SpatialVision/jsPDF,yWorks/jsPDF,jutunen/jsPDF-table_2,MrRio/jsPDF,MrRio/jsPDF