Updating the Camera plugin directly is unfortunately not possible, as it's integrated into the native wrapper runtime. What you'd need to do is to fork and namespace the whole package (into like .kamera), so the code doesn't conflict. It's a hoop to jump through, but possible.
As for the actual error, our Build Service doesn't support plugin dependencies with Plugman. You'd have to add the
cordova-plugin-compat into your app's plugins array manually, and then remove the dependency line from