clippy fixes

src/error.rs

@@ -257,7 +257,7 @@ impl<'source> ExpectToken<'source> for Option<SpannedToken<'source>> {
     }
 }
 
-impl<'a, 'source> ExpectToken<'source> for Option<&'a SpannedToken<'source>> {
+impl<'source> ExpectToken<'source> for Option<&'_ SpannedToken<'source>> {
     fn expect_token(
         self,
         expected: &[Token],

src/lexer.rs

@@ -220,7 +220,7 @@ impl<'source> SpannedToken<'source> {
     }
 }
 
-impl<'source> Debug for SpannedToken<'source> {
+impl Debug for SpannedToken<'_> {
     fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
         write!(
             f,

src/serde_impl.rs

@@ -138,7 +138,7 @@ impl<'de> Deserializer<'de> {
     }
 }
 
-impl<'de, 'a> de::Deserializer<'de> for &'a mut Deserializer<'de> {
+impl<'de> de::Deserializer<'de> for &mut Deserializer<'de> {
     type Error = ParseError;
 
     fn deserialize_any<V>(self, visitor: V) -> Result<V::Value>
@@ -493,7 +493,7 @@ impl<'source, 'a> ArrayWalker<'source, 'a> {
     }
 }
 
-impl<'de, 'a> SeqAccess<'de> for ArrayWalker<'de, 'a> {
+impl<'de> SeqAccess<'de> for ArrayWalker<'de, '_> {
     type Error = ParseError;
 
     fn next_element_seed<T>(&mut self, seed: T) -> Result<Option<T::Value>>
@@ -581,7 +581,7 @@ impl<'de, 'a> SeqAccess<'de> for ArrayWalker<'de, 'a> {
     }
 }
 
-impl<'de, 'a> MapAccess<'de> for ArrayWalker<'de, 'a> {
+impl<'de> MapAccess<'de> for ArrayWalker<'de, '_> {
     type Error = ParseError;
 
     fn next_key_seed<K>(&mut self, seed: K) -> Result<Option<K::Value>>
@@ -706,7 +706,7 @@ impl<'a, 'de> Enum<'a, 'de> {
 //
 // Note that all enum deserialization methods in Serde refer exclusively to the
 // "externally tagged" enum representation.
-impl<'de, 'a> EnumAccess<'de> for Enum<'a, 'de> {
+impl<'de> EnumAccess<'de> for Enum<'_, 'de> {
     type Error = ParseError;
     type Variant = Self;
 
@@ -724,7 +724,7 @@ impl<'de, 'a> EnumAccess<'de> for Enum<'a, 'de> {
 
 // `VariantAccess` is provided to the `Visitor` to give it the ability to see
 // the content of the single variant that it decided to deserialize.
-impl<'de, 'a> VariantAccess<'de> for Enum<'a, 'de> {
+impl<'de> VariantAccess<'de> for Enum<'_, 'de> {
     type Error = ParseError;
 
     fn unit_variant(self) -> Result<()> {

src/string.rs

@@ -179,7 +179,7 @@ struct PeekableBytes<'a> {
     pos: usize,
 }
 
-impl<'a> Iterator for PeekableBytes<'a> {
+impl Iterator for PeekableBytes<'_> {
     type Item = u8;
 
     fn next(&mut self) -> Option<Self::Item> {