use fnv instead of md5

cmd/main.go

@@ -1,5 +1,13 @@
 package main
 
+import (
+	"fmt"
+
+	go_colorhash "github.com/taigrr/go-colorhash"
+)
+
 func main() {
 
+	x := go_colorhash.HashString("asdasd")
+	fmt.Println(x)
 }

hash.go

@@ -3,6 +3,7 @@ package go_colorhash
 import (
 	"crypto/md5"
 	"encoding/binary"
+	"hash/fnv"
 	"io"
 )
 
@@ -10,7 +11,7 @@ const MaxUint = ^uint(0)
 const MaxInt = int(MaxUint >> 1)
 
 func HashString(s string) int {
-	h := md5.New()
+	h := fnv.New64()
 	io.WriteString(h, s)
 	hashb := h.Sum(nil)
 	hashb = hashb[len(hashb)-8:]

hash_test.go

@@ -15,10 +15,10 @@ func TestHashString(t *testing.T) {
 		String string
 		Value  int
 		ID     string
-	}{{String: "", Value: 7602086723416769149, ID: "Empty string"},
-		{String: "123", Value: 1606385479620709231, ID: "123"},
-		{String: "it's as easy as", Value: 5377981271559288604, ID: "easy"},
-		{String: "hello colorhash", Value: 4155814819593785823, ID: "hello"}}
+	}{{String: "", Value: 5472609002491880228, ID: "Empty string"},
+		{String: "123", Value: 6449148174219763898, ID: "123"},
+		{String: "it's as easy as", Value: 5908178111834329190, ID: "easy"},
+		{String: "hello colorhash", Value: 893132354324239557, ID: "hello"}}
 	for _, tc := range testStrings {
 		t.Run(tc.ID, func(t *testing.T) {
 			hash := HashString(tc.String)