internals: add clippy::use_self lint

diff --git a/internals/Cargo.toml b/internals/Cargo.toml
index deffa841..2c41b3c3 100644
--- a/internals/Cargo.toml
+++ b/internals/Cargo.toml
@@ -36,3 +36,6 @@ rustdoc-args = ["--cfg", "docsrs"]
 
 [lints.rust]
 unexpected_cfgs = { level = "deny", check-cfg = ['cfg(kani)'] }
+
+[lints.clippy]
+use_self = "warn"
diff --git a/internals/src/array_vec.rs b/internals/src/array_vec.rs
index 9e402b02..40157a27 100644
--- a/internals/src/array_vec.rs
+++ b/internals/src/array_vec.rs
@@ -140,7 +140,7 @@ impl<T: Copy + PartialEq, const CAP: usize, const LEN: usize> PartialEq<ArrayVec
 }
 
 impl<T: Copy + Ord, const CAP: usize> Ord for ArrayVec<T, CAP> {
-    fn cmp(&self, other: &ArrayVec<T, CAP>) -> core::cmp::Ordering { (**self).cmp(&**other) }
+    fn cmp(&self, other: &Self) -> core::cmp::Ordering { (**self).cmp(&**other) }
 }
 
 impl<T: Copy + PartialOrd, const CAP1: usize, const CAP2: usize> PartialOrd<ArrayVec<T, CAP2>>
diff --git a/internals/src/error/input_string.rs b/internals/src/error/input_string.rs
index b544c734..d5e71aa3 100644
--- a/internals/src/error/input_string.rs
+++ b/internals/src/error/input_string.rs
@@ -122,7 +122,7 @@ mod storage {
     }
 
     impl From<&str> for Storage {
-        fn from(_value: &str) -> Self { Storage }
+        fn from(_value: &str) -> Self { Self }
     }
 
     pub(super) fn cannot_parse<W>(_: &Storage, what: &W, f: &mut fmt::Formatter) -> fmt::Result