fix(constraints): relax Parser contrains for Not and Padded (#917)

Both of the parsers required `ValueInput` though neither require it for
their implementation.

Author: Zij-IT

src/combinator.rs

@@ -2385,7 +2385,7 @@ impl<A: Clone, OA> Clone for Not<A, OA> {
 
 impl<'src, I, E, A, OA> Parser<'src, I, (), E> for Not<A, OA>
 where
-    I: ValueInput<'src>,
+    I: Input<'src>,
     E: ParserExtra<'src, I>,
     A: Parser<'src, I, OA, E>,
 {

src/text.rs

@@ -194,7 +194,7 @@ pub struct Padded<A> {
 
 impl<'src, I, O, E, A> Parser<'src, I, O, E> for Padded<A>
 where
-    I: ValueInput<'src>,
+    I: Input<'src>,
     E: ParserExtra<'src, I>,
     I::Token: Char,
     A: Parser<'src, I, O, E>,