fix last commit (specify PDFjs revision)
fix last commit (specify PDFjs revision)

utkarshx/ViewerJS,chrilith/ViewerJS,haojiejie/ViewerJS,kogmbh/ViewerJS,h44z/ViewerJS,h44z/ViewerJS,PhillipMwaniki/ViewerJS,CypressBusinessSolutions/ViewerJS,kogmbh/ViewerJS,haojiejie/ViewerJS,luiseduardohdbackup/ViewerJS,CypressBusinessSolutions/ViewerJS,gdseller/ViewerJS,luiseduardohdbackup/ViewerJS,chrilith/ViewerJS,gdseller/ViewerJS,PhillipMwaniki/ViewerJS,utkarshx/ViewerJS