go get github.com/nemzyxt/shuffler

package main

import (
    "fmt"
    "github.com/nemzyxt/shuffler"
)

func main() {
    arr := [5]int{1, 2, 3, 4, 5}
    shuffler.FisherYatesShuffle[int](arr[:]) // use the Fisher-Yates algorithm
    fmt.Println(arr)
}