New package: gmetronome-0.5.1

[AsylumDEG]

Testing the changes

• I tested the changes in this PR: YES
• I tested the application at runtime with both PulseAudio and ALSA backends, and the audio routed as expected.

New package

• This new package conforms to the package requirements: YES

Local build testing

• I built this PR locally for my native architecture (x86_64-glibc)
• I also built this PR locally for these architectures:
  • aarch64
  • armv6l

[AsylumDEG]

I amended my commit and replaced the author no-reply with my valid email. I had misunderstood the guide and thought having a valid email in the package template was enough.

This is my first Void PR, so apologies for the extra CI run. The updated commit is now pushed.