Algernon 1.15.4

Usability

• Add a newline to the help output (thanks @arimal199).
• Let the servedir Lua function check the given arguments.

Security updates

• Compile with Go 1.21 + update the http2 dependency, ref CVE-2023-39325

Dependencies

• Use the orsinium-labs/enum package for an enum in logo_unix.go.
• Remove deprecated bmizerany/assert.
• Update all dependencies.

Performance

• Use the dkorunic/betteralign utility to align struct fields.
• Enable profile-guided optimization (new feature in Go 1.21).

General

• Improve the alg2docker and benchmark scripts.
• Use the GOEXPERIMENT=loopvar feature.
• Update the GitHub action for Homebrew.
• Update CI configuration.
• Require Go 1.20 or Go 1.21.
• Build the release binaries with Go 1.21.