chore: Fix errors reported by clippy beta

This fixes errors like

    error: the following explicit lifetimes could be elided: 'a

swf/src/types.rs

@@ -1575,7 +1575,7 @@ impl<'a> EditText<'a> {
  }
 }
 
-impl<'a> Default for EditText<'a> {
+impl Default for EditText<'_> {
  fn default() -> Self {
  Self {
  id: Default::default(),

wstr/src/buf.rs

@@ -306,7 +306,7 @@ impl WString {
  }
  }
 
- impl<'a> Drop for Guard<'a> {
+ impl Drop for Guard<'_> {
  fn drop(&mut self) {
  // SAFETY: something has gone wrong, replace the buffer with an empty one and drop it.
  unsafe {

wstr/src/common.rs

@@ -473,14 +473,14 @@ impl WStr {
  }
 }
 
-impl<'a> Default for &'a WStr {
+impl Default for &WStr {
  #[inline]
  fn default() -> Self {
  WStr::empty()
  }
 }
 
-impl<'a> Default for &'a mut WStr {
+impl Default for &mut WStr {
  #[inline]
  fn default() -> Self {
  WStr::empty_mut()

wstr/src/ops.rs

@@ -12,7 +12,7 @@ pub struct Iter<'a> {
  inner: Units<SliceIter<'a, u8>, SliceIter<'a, u16>>,
 }
 
-impl<'a> Iterator for Iter<'a> {
+impl Iterator for Iter<'_> {
  type Item = u16;
 
  #[inline]
@@ -24,7 +24,7 @@ impl<'a> Iterator for Iter<'a> {
  }
 }
 
-impl<'a> DoubleEndedIterator for Iter<'a> {
+impl DoubleEndedIterator for Iter<'_> {
  #[inline]
  fn next_back(&mut self) -> Option<Self::Item> {
  match &mut self.inner {
@@ -41,7 +41,7 @@ pub struct CharIndices<'a> {
  start: usize,
 }
 
-impl<'a> Iterator for CharIndices<'a> {
+impl Iterator for CharIndices<'_> {
  type Item = (usize, Result<char, core::char::DecodeUtf16Error>);
 
  #[inline]

wstr/src/pattern.rs

@@ -221,7 +221,7 @@ impl EmptySearcher {
  }
 }
 
-impl<'a> Searcher<'a> for EmptySearcher {
+impl Searcher<'_> for EmptySearcher {
  fn next(&mut self) -> SearchStep {
  match self.range.next() {
  Some(i) => SearchStep::Match(i, i),
@@ -255,7 +255,7 @@ impl<T: Copy + Eq> Predicate<T> for T {
 
 pub struct AnyOf<'a, T>(&'a [T]);
 
-impl<'a, T: Copy, U: Copy + Eq + TryFrom<T>> Predicate<T> for AnyOf<'a, U> {
+impl<T: Copy, U: Copy + Eq + TryFrom<T>> Predicate<T> for AnyOf<'_, U> {
  fn matches(&mut self, c: T) -> bool {
  self.0.iter().any(|m| U::try_from(c).ok() == Some(*m))
  }

wstr/src/utils.rs

@@ -131,7 +131,7 @@ impl<'a> DecodeAvmUtf8<'a> {
  }
 }
 
-impl<'a> Iterator for DecodeAvmUtf8<'a> {
+impl Iterator for DecodeAvmUtf8<'_> {
  type Item = u32;
  fn next(&mut self) -> Option<Self::Item> {
  let first = *self.src.get(self.index)?;