There is an updated pull request by klarasm against master on the void-packages repository

https://github.com/klarasm/void-packages bird-2.13
https://github.com/void-linux/void-packages/pull/43604

bird: update to 2.13
- drop patch for failing tests on musl, not needed anymore
- upstream changed versioning

#### Testing the changes
- I tested the changes in this PR: **YES**

#### Local build testing
- I built this PR locally for my native architecture, (x86_64-glibc, x86_64-musl)
- I built this PR locally for these architectures (if supported. mark crossbuilds):
  - aarch64-musl
  - armv7l
  - armv6l-musl

A patch file from https://github.com/void-linux/void-packages/pull/43604.patch is attached