Internal error when running linter built with Go 1.24

[alexandear]

Steps to reproduce

1. Build the binary with Go 1.24:

$ go version
go version go1.24.0 darwin/arm64

$ go build -o asciicheck cmd/asciicheck/main.go

2. Run the linter against the asciicheck codebase:

$ pwd
/Users/Oleksandr_Redko/src/github.com/tdakkota/asciicheck

$ ./asciicheck ./...

Expected:

No output.

Actual:

An error appeared asciicheck: internal error: package "unicode" without types was imported from "github.com/tdakkota/asciicheck"

[alexandear]

Fixed by #27