Warnings and diagnostics sent to stdout instead of stderr

[Earnestly]

When redirecting pacgraph -c output the warnings and diagnostics are sent to stdout instead of the expected stderr such that the output file contains messages such as:

Autodetected Arch.
Loading package info
warning: xf86-input-driver found in ['xf86-input-evdev', 'xf86-input-libinput'], assuming xf86-input-evdev
...

Ideally these would be sent to stderr making it easier to parse the output as wanted without needing heuristics to peel away these other messages.