Embedded FS on Windows

[Dissociable]

Description
Basically, this is a bug only for Windows. readMigrationsDir sets the dir path via filepath.Clean(dir) which changes the / to \ on Windows.
fs.ReadDir Is not able to handle that. changing filepath.Clean(...) to path.Clean(...) would simply fix it.

• Version: v2.14.0
• Database: Postgresql
• Operating System: Windows 10

Steps To Reproduce

//go:embed migrate/migrations/*
var EmbeddedMigrations embed.FS


	dbMate := dbmate.New(getAddr(dbName))
	dbMate.FS = ent.EmbeddedMigrations
	dbMate.MigrationsDir = []string{"migrate/migrations"}
	fmt.Println("Migrations:")
	migrations, err := dbMate.FindMigrations()
	if err != nil {
		panic(err)
	}

Expected Behavior
Find the embedded files at migrate/migrations

[dossy]

@Dissociable thanks for reporting this.

This makes me wonder: is it worth investing time in extending our CI test to add a Windows runner to test dbmate on, as well? Similarly, should we add a macOS runner, too?

I know that GitHub hosted Windows and Mac action runners are considerably more expensive, and I don't know if @amacneil wants to incur those costs for the project or not.

[boludoz]

@Dissociable contact with me in discord