Upgrade dependencies, go fmt, fixed whitespace handling, switched t…

[SamuelMarks]

Changelog:

• Upgraded dependencies
• go fmt
• Fixed whitespace handling (Fprint can eat empty lines. #81)
• Switched to GitHub Actions
• Add docstrings
• Generic type aliases (type A[T any] = B[T])
• //go:build directives and GoVersion file metadata
• Iterator syntax (range over func)

#85

[SamuelMarks]

@dave @snakeice THis is approved! - Can you merge?

[dave]

Thanks for this @SamuelMarks, and sorry for the slow reply.

I've opened #88, which takes the core of your work — the dependency upgrade, the Actions migration, the gofmt pass, the vet example renames and the #81 fix — with your authorship on those commits. I kept it narrow because the library has a lot of users and I wanted the smallest change that gets us current.

Two things you'll want to know:

1. x/tools v0.41.0 can't read the export data Go 1.27 emits — it fails with export data version 4 is greater than maximum supported version 2 in the gotypes and gopackages resolvers. V4 support landed in v0.44.0; Upgrade for current Go releases #88 uses v0.50.0.

2. The mangled doc comments in your decorations-types-generated.go weren't your fault. gendst sliced positions.go using token.Pos values that are relative to the file's base in the FileSet, and go/loader parses a package's files concurrently — so regenerating could silently corrupt that file or panic outright. Upgrade for current Go releases #88 fixes it.

I left out the TypeSpec Assign change. You're right that the = is mis-ordered for generic aliases, but it adds a public decoration point and moves comment attachment from Name to Assign for all aliases, which is a behaviour change for existing users. Worth doing on its own — happy to look at a PR for just that.

I also skipped the added docstrings, and restored the file-level skips in the stdlib test rather than skipping runtime/reflect/internal/godebug wholesale, since that test is the main regression guard.

Closing this in favour of #88 — thanks again for the push to get this up to date.