all: replace []byte with []u8

vlib/builtin/js/array.js.v

@@ -373,7 +373,7 @@ pub fn (mut a array) delete_last() {
 pub fn (a &array) free() {
 }
 
-// todo: once (a []byte) will work rewrite this
+// todo: once (a []u8) will work rewrite this
 pub fn (a array) bytestr() string {
 	res := ''
 	#for (let i = 0;i < a.arr.len.valueOf();i++) res.str += String.fromCharCode(a.arr.get(new int(i)))
@@ -487,7 +487,7 @@ pub interface JS.Float64Array {
 	every(JS.EveryFn) JS.Boolean
 }
 
-pub fn uint8_array(arr []byte) JS.Uint8Array {
+pub fn uint8_array(arr []u8) JS.Uint8Array {
 	#let tmp = new Array();
 
 	for elem in arr {

vlib/builtin/js/int.js.v

@@ -142,7 +142,7 @@ pub fn (x byte) hex() string {
 
 // hex returns a string with the hexadecimal representation
 // of the byte elements of the array.
-pub fn (b []byte) hex() string {
+pub fn (b []u8) hex() string {
 	mut hex := ''
 	for i in b {
 		mut z := i

vlib/builtin/js/string.js.v

@@ -85,13 +85,13 @@ pub fn (s string) split(dot string) []string {
 	return arr
 }
 
-pub fn (s string) bytes() []byte {
+pub fn (s string) bytes() []u8 {
 	sep := ''
 	tmparr := s.str.split(sep.str).map(fn (it JS.Any) JS.Any {
 		return JS.Any(u8(JS.String(it).charCodeAt(JS.Number(0))))
 	})
 	_ := tmparr
-	mut arr := []byte{}
+	mut arr := []u8{}
 	#arr = new array(new array_buffer({arr: tmparr,index_start: new int(0),len: new int(tmparr.length)}))
 
 	return arr
@@ -500,7 +500,7 @@ pub fn (s string) strip_margin_custom(del byte) string {
 	}
 	// don't know how much space the resulting string will be, but the max it
 	// can be is this big
-	mut ret := []byte{}
+	mut ret := []u8{}
 	#ret = new array()
 
 	mut count := 0