Fix clippy warnings

src/authenticator.rs

@@ -51,7 +51,7 @@ where
 }
 
 struct DisplayScopes<'a, T>(&'a [T]);
-impl<'a, T> fmt::Display for DisplayScopes<'a, T>
+impl<T> fmt::Display for DisplayScopes<'_, T>
 where
     T: AsRef<str>,
 {

src/error.rs

@@ -102,7 +102,7 @@ impl From<String> for AuthErrorCode {
     }
 }
 
-impl<'a> From<&'a str> for AuthErrorCode {
+impl From<&str> for AuthErrorCode {
     fn from(s: &str) -> Self {
         AuthErrorCode::from_string(s)
     }
@@ -114,7 +114,7 @@ impl<'de> Deserialize<'de> for AuthErrorCode {
         D: serde::Deserializer<'de>,
     {
         struct V;
-        impl<'de> serde::de::Visitor<'de> for V {
+        impl serde::de::Visitor<'_> for V {
             type Value = AuthErrorCode;
             fn expecting(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
                 f.write_str("any string")

src/storage.rs

@@ -62,12 +62,12 @@ pub(crate) struct ScopeSet<'a, T> {
 
 // Implement Clone manually. Auto derive fails to work correctly because we want
 // Clone to be implemented regardless of whether T is Clone or not.
-impl<'a, T> Clone for ScopeSet<'a, T> {
+impl<T> Clone for ScopeSet<'_, T> {
     fn clone(&self) -> Self {
         *self
     }
 }
-impl<'a, T> Copy for ScopeSet<'a, T> {}
+impl<T> Copy for ScopeSet<'_, T> {}
 
 impl<'a, T> ScopeSet<'a, T>
 where