Doesn't work when vendored

[jcornaz]

This project doesn't work when vendored.

To reproduce

# Create a go project
mkdir go-libsql-vendor-bug
cd go-libsql-vendor-bug
go mod init go-libsql-vendor-bug

# Write a main file
cat << EOF >> main.go
package main

import (
        _ "github.com/tursodatabase/go-libsql"
)

func main() {
}
EOF

# Vendor
go mod tidy
go mod vendor

# Try to build (Will fail)
go build .

Error

# github.com/tursodatabase/go-libsql
vendor/github.com/tursodatabase/go-libsql/libsql.go:16:10: fatal error: libsql.h: No such file or directory
   16 | #include <libsql.h>
      |          ^~~~~~~~~~

(may be related to #21)

Workaround

One may manually copy the content of the lib directory to fix the compilation issue. However, go mod vendor will always delete the workaround.