v1.3.1

HomalgProject v1.3.1

Diff since v1.3.0

Merged pull requests:

• CompatHelper: bump compat for Singular to 0.18, (keep existing compat) (#98) (@github-actions[bot])
• test 1.9 instead of 1.8 (#99) (@mohamed-barakat)
• comply with new package standards (#100) (@mohamed-barakat)