Deployer v8 Support

[gaambo]

Deployer v8 is not yet officially released.

• Upgrade Guide: https://deployer.org/docs/8.x/UPGRADE#upgrade-from-7x-to-8x
• Releases: https://github.com/deployphp/deployer/releases?q=&expanded=true

Changes

Changes to look at

• https://github.com/deployphp/deployer/pull/4044/changes
• feat: add new local_archive update code strategy deployphp/deployer#4017
• fix(rsync): Use named arguments for runLocally deployphp/deployer#4158
• Install specific Composer version deployphp/deployer#4159

Todos

• Add v8 to test matrix in GitHub Actions