There's a closed pull request on the void-packages repository

New package: crystal-1.0.0
https://github.com/void-linux/void-packages/pull/30019

Description:
#### General
- [x] This is a new package and it conforms to the [quality requirements](https://github.com/void-linux/void-packages/blob/master/Manual.md#quality-requirements)

#### Have the results of the proposed changes been tested?
- [x] I use the packages affected by the proposed changes on a regular basis and confirm this PR works for me
- [ ] I generally don't use the affected packages but briefly tested this PR

#### Extra info

- upgrade to llvm11
- use openssl
- re-enabled do_check()

#### Archs

- I built this PR locally for these architectures with -Q:
  - [x] i686-glibc with -Q
  - [x] x86_64-glibc with -Q
  - [x] x86_64-musl with -Q

Were not able to test the ARM platforms