Yeah, I can confirm that with some effort, it’s possible to compile the code even with updated libraries. It’s correct stating that it’s just a matter of setting up the Arduino environment.
I managed to add a recent version of the Oled library, and all it took was this modification: https://github.com/ebaschiera/OSBeeWiFi-Firmware/commit/4f61fb03acdd02437ada2f385970a8ccda97a088
Updating the Blynk library looked a bit more complicated, so I stopped and kept the same “major” version: 0.4.10