add version file and --version arg to CLI

main.go

@@ -18,11 +18,17 @@ import (
 
 var url = flag.String("url", "", "")
 var migrationsPath = flag.String("path", "", "")
+var version = flag.Bool("version", false, "Show migrate version")
 
 func main() {
 	flag.Parse()
 	command := flag.Arg(0)
 
+	if *version {
+		fmt.Printf("%.2f", Version)
+		os.Exit(0)
+	}
+
 	if *migrationsPath == "" {
 		*migrationsPath, _ = os.Getwd()
 	}

version.go

@@ -0,0 +1,3 @@
+package main
+
+const Version float64 = 1.1