I've just installed Virtuemart 3 on J3. With VM3, I also installed its plugin for PDF invoices etc. So now I see that updated is available for TcPdf Library. But also there's a warning message: "Before updating ensure that the update is compatible with your Joomla! installation." I don't know if it is compatible. Versions-wise. My Joomla is 3.6.0 and my Virtuemart is 3.0.16
Well... knowing that TCPDF is Open Source PHP class for generating PDF documents (tcpdf.org), and that is included in thousands of CMS and Web applications, I am quite confident that is compatible with newest Joomla.
It's update 1.0.2 is even listed on VM project files repository.
I have updated it few weeks ago myself on the same combo J! 3.6.2 + VM 3.0.16 without any problems.