fix(parser): Switch u8 from one_of to literal

Based on how `char` went, I figured we will likely see similar.

Fixes #427

BREAKING CHANGE: `u8` parers now  require `I: Compare<u8>`

src/parser.rs

@@ -727,19 +727,20 @@ where
 ///     b'a'.parse_next(i)
 /// }
 /// assert_eq!(parser.parse_peek(&b"abc"[..]), Ok((&b"bc"[..], b'a')));
-/// assert_eq!(parser.parse_peek(&b" abc"[..]), Err(ErrMode::Backtrack(InputError::new(&b" abc"[..], ErrorKind::Verify))));
-/// assert_eq!(parser.parse_peek(&b"bc"[..]), Err(ErrMode::Backtrack(InputError::new(&b"bc"[..], ErrorKind::Verify))));
-/// assert_eq!(parser.parse_peek(&b""[..]), Err(ErrMode::Backtrack(InputError::new(&b""[..], ErrorKind::Token))));
+/// assert_eq!(parser.parse_peek(&b" abc"[..]), Err(ErrMode::Backtrack(InputError::new(&b" abc"[..], ErrorKind::Tag))));
+/// assert_eq!(parser.parse_peek(&b"bc"[..]), Err(ErrMode::Backtrack(InputError::new(&b"bc"[..], ErrorKind::Tag))));
+/// assert_eq!(parser.parse_peek(&b""[..]), Err(ErrMode::Backtrack(InputError::new(&b""[..], ErrorKind::Tag))));
 /// ```
 impl<I, E> Parser<I, u8, E> for u8
 where
     I: StreamIsPartial,
-    I: Stream<Token = u8>,
+    I: Stream,
+    I: Compare<u8>,
     E: ParserError<I>,
 {
     #[inline(always)]
     fn parse_next(&mut self, i: &mut I) -> PResult<u8, E> {
-        crate::token::one_of(*self).parse_next(i)
+        crate::token::literal(*self).value(*self).parse_next(i)
     }
 }