all: replace []byte with []u8

vlib/encoding/hex/hex.v

@@ -5,7 +5,7 @@ import strings
 // decode converts a hex string into an array of bytes. The expected
 // input format is 2 ASCII characters for each output byte. If the provided
 // string length is not a multiple of 2, an implicit `0` is prepended to it.
-pub fn decode(s string) ?[]byte {
+pub fn decode(s string) ?[]u8 {
 	mut hex_str := s
 	if hex_str.len >= 2 {
 		if s[0] == `0` && (s[1] == `x` || s[1] == `X`) {
@@ -13,7 +13,7 @@ pub fn decode(s string) ?[]byte {
 		}
 	}
 	if hex_str.len == 0 {
-		return []byte{}
+		return []u8{}
 	} else if hex_str.len == 1 {
 		return [char2nibble(hex_str[0]) ?]
 	} else if hex_str.len == 2 {
@@ -27,7 +27,7 @@ pub fn decode(s string) ?[]byte {
 		val = (val << 4) | char2nibble(hex_str[1]) ?
 	}
 	// set cap to hex_str.len/2 rounded up
-	mut bytes := []byte{len: 1, cap: (hex_str.len + 1) >> 1, init: val}
+	mut bytes := []u8{len: 1, cap: (hex_str.len + 1) >> 1, init: val}
 	// iterate over every 2 bytes
 	// the start index depends on if hex_str.len is odd
 	for i := 2 - (hex_str.len & 1); i < hex_str.len; i += 2 {
@@ -41,7 +41,7 @@ pub fn decode(s string) ?[]byte {
 // encode converts an array of bytes into a string of ASCII hex bytes. The
 // output will always be a string with length a multiple of 2.
 [manualfree]
-pub fn encode(bytes []byte) string {
+pub fn encode(bytes []u8) string {
 	mut sb := strings.new_builder(bytes.len * 2)
 	for b in bytes {
 		sb.write_string(b.hex())