Feature request: upgrade pdfium version

[nguyenyou]

Hi @jichang,

Hope you're doing well! It's been a while since the last update, and I was wondering if you could consider bumping the PDFium version to the latest one whenever you have some free time. No rush at all—just whenever it's convenient for you. Thanks so much for all your hard work! 😊

[nguyenyou]

Hi @jichang,

Hope you're doing well! I'd like to help keep the PDFium version up to date. I've noticed that each update tends to break something, requiring adjustments to the build configuration.

Could you guide me on how to resolve these issues? I'd love to understand the process so that I can research, update the configuration myself, and contribute back in the future.

Thanks for all your hard work!