Rename migrations package, to match goose generated migration files

db/migration/20200710211442_add_playlist_path.go

@@ -1,27 +0,0 @@
-package migration
-
-import (
-	"database/sql"
-
-	"github.com/pressly/goose"
-)
-
-func init() {
-	goose.AddMigration(upAddPlaylistPath, downAddPlaylistPath)
-}
-
-func upAddPlaylistPath(tx *sql.Tx) error {
-	_, err := tx.Exec(`
-alter table playlist
-	add path string default '' not null;
-
-alter table playlist
-	add sync bool default false not null;
-`)
-
-	return err
-}
-
-func downAddPlaylistPath(tx *sql.Tx) error {
-	return nil
-}