fixes incombatability with [email protected]

[mio991]

Hey, I don't know if this is the right solution it just worked for me. Had some TypeErrors with the current jsPDF version I think this should fix it

[westwick]

I think main jspdf lib incorporated custom font support directly without the need for this package any longer, as of 1.5. Unless I'm missing something. I removed this package after updating and everything seems to be working. I guess this package remains just to support projects still using jspdf 1.4 and under. Maybe the documentation should be updated