Allow use of PdfFileMerger (credit to cgammans)
Allow use of PdfFileMerger (credit to cgammans)

KumaranKamalanathan/PyPDF2,KumaranKamalanathan/PyPDF2,vfulco/PyPDF2,manuelzs/PyPDF2,melsior/PyPDF2,magnet-cl/PyPDF2,dellelce/ypypdf2,manuelzs/PyPDF2,melsior/PyPDF2,dellelce/ypypdf2,magnet-cl/PyPDF2,vfulco/PyPDF2