[ci] Use ArchLinux as base.

1 job for v1.3.0 in 27 seconds (queued for 8 seconds)
Status Name Job ID Coverage
  Test
failed package #21669

00:00:27

 
Name Stage Failure
failed
package Test
core/curl            7.82.0-1     7.82.0-1       0.00 MiB       1.10 MiB
extra/php7 7.4.28-1 23.11 MiB 3.74 MiB

Total Download Size: 5.28 MiB
Total Installed Size: 26.17 MiB
Net Upgrade Size: 24.38 MiB

Cleaning up project directory and file based variables
ERROR: Job failed: exit code 1