build(deps): bump quick-xml from 0.41.0 to 0.42.0

[dependabot]

Bumps quick-xml from 0.41.0 to 0.42.0.

Release notes

Sourced from quick-xml's releases.

v0.42.0 - String Ergonomics

What's Changed

0.42.0 -- 2026-08-22

This is a large release. The primary change is an ergonomic improvement across the entire API - quick_xml now makes use of &str and String types where possible instead of &[u8] and Vec<u8>. This requires significant refactoring of downstream code, but should result in a net simplification as well as potential performance improvements, and opens up additional opportunities in future releases.

The MSRV has been raised to 1.86. We now use Rust 2024 Edition.

Breaking Changes

• #963: Reader now validates that input is valid UTF-8 when constructing events. Non-UTF-8 input passed to Reader::from_reader() without DecodingReader will now produce Error::Encoding instead of silently passing through invalid bytes. Use DecodingReader to transcode non-UTF-8 sources.
• #963: Name types (QName, LocalName, Prefix, Namespace, PrefixDeclaration) now wrap &str instead of &[u8]. into_inner() returns &str, and AsRef<str> is implemented (AsRef<[u8]> has been removed). ResolveResult::Unknown now contains String instead of Vec<u8>, and NamespaceError variants contain String instead of Vec<u8>.
• #963: Removed the decoder: Decoder field from event types (BytesStart, BytesText, BytesCData, BytesRef) and Attributes. The decoder() method is no longer available on these types. Decode methods on events now always assume UTF-8 input. Error::missed_end() no longer takes a Decoder parameter.
• #963: Event types (BytesStart, BytesEnd, BytesText, BytesCData, BytesPI, BytesRef) now store Cow<str> internally instead of Cow<[u8]>. into_inner() on BytesText, BytesCData, BytesPI, and BytesRef now returns Cow<str>. BytesStart::set_name() now takes &str instead of &[u8].
• #963: All event types and the Event enum now implement Deref<Target = str> instead of Deref<Target = [u8]>. Explicit AsRef<str> impls are provided to avoid ambiguity.
• #963: Removed decode() methods from BytesText, BytesCData, and BytesRef. Content is already available as &str via Deref. The xml10_content(), xml11_content(), xml_content(), and html_content() methods now return Cow<str> directly instead of Result<Cow<str>, EncodingError>.
• #963: Attribute::value is now Cow<'a, str> instead of Cow<'a, [u8]>. The From<(&[u8], &[u8])> impl has been removed.
• #963: BytesDecl::version(), encoding(), and standalone() now return Cow<'_, str> instead of Cow<'_, [u8]>.
• #963: Removed Reader::decoder() method. Use Reader::encoding() instead (available with the encoding feature). Removed decoder() from the XmlRead serde trait. Removed all methods from Decoder (the struct is kept only for backward compatibility with deprecated Attribute methods).
• #980: NamespaceError::TooManyDeclarations has been renamed to TooManyBindings, and NamespaceResolver::set_max_declarations_per_element has been renamed to NamespaceResolver::set_max_namespace_bindings, and the semantic behavior has

... (truncated)

Changelog

Sourced from quick-xml's changelog.

0.42.0 -- 2026-08-22

This is a large release. The primary change is an ergonomic improvement across the entire API - quick_xml now makes use of &str and String types where possible instead of &[u8] and Vec<u8>. This requires significant refactoring of downstream code, but should result in a net simplification as well as potential performance improvements, and opens up additional opportunities in future releases.

The MSRV has been raised to 1.86. We now use Rust 2024 Edition.

Breaking Changes

• #963: Reader now validates that input is valid UTF-8 when constructing events. Non-UTF-8 input passed to Reader::from_reader() without DecodingReader will now produce Error::Encoding instead of silently passing through invalid bytes. Use DecodingReader to transcode non-UTF-8 sources.
• #963: Name types (QName, LocalName, Prefix, Namespace, PrefixDeclaration) now wrap &str instead of &[u8]. into_inner() returns &str, and AsRef<str> is implemented (AsRef<[u8]> has been removed). ResolveResult::Unknown now contains String instead of Vec<u8>, and NamespaceError variants contain String instead of Vec<u8>.
• #963: Removed the decoder: Decoder field from event types (BytesStart, BytesText, BytesCData, BytesRef) and Attributes. The decoder() method is no longer available on these types. Decode methods on events now always assume UTF-8 input. Error::missed_end() no longer takes a Decoder parameter.
• #963: Event types (BytesStart, BytesEnd, BytesText, BytesCData, BytesPI, BytesRef) now store Cow<str> internally instead of Cow<[u8]>. into_inner() on BytesText, BytesCData, BytesPI, and BytesRef now returns Cow<str>. BytesStart::set_name() now takes &str instead of &[u8].
• #963: All event types and the Event enum now implement Deref<Target = str> instead of Deref<Target = [u8]>. Explicit AsRef<str> impls are provided to avoid ambiguity.
• #963: Removed decode() methods from BytesText, BytesCData, and BytesRef. Content is already available as &str via Deref. The xml10_content(), xml11_content(), xml_content(), and html_content() methods now return Cow<str> directly instead of Result<Cow<str>, EncodingError>.
• #963: Attribute::value is now Cow<'a, str> instead of Cow<'a, [u8]>. The From<(&[u8], &[u8])> impl has been removed.
• #963: BytesDecl::version(), encoding(), and standalone() now return Cow<'_, str> instead of Cow<'_, [u8]>.
• #963: Removed Reader::decoder() method. Use Reader::encoding() instead (available with the encoding feature). Removed decoder() from the XmlRead serde trait. Removed all methods from Decoder (the struct is kept only for backward compatibility with deprecated Attribute methods).
• #980: NamespaceError::TooManyDeclarations has been renamed to TooManyBindings, and NamespaceResolver::set_max_declarations_per_element has been renamed to NamespaceResolver::set_max_namespace_bindings, and the semantic behavior has changed slightly. The default maximum has also been reduced from 256 to 128.
• #1000: DeError::UnexpectedStart renamed to DeError::MixedContent. That error is emitted when you try to deserialize boolean, number or string field from something like <field>text <tag/> another text</field>.

... (truncated)

Commits

• 36a2c52 Release 0.42.0
• a4b9fca cargo fmt
• 22c99f5 Update Rust Edition to 2024
• 83351fb Add rename = $value to a table in serde example comments
• f4db767 Clarify documentation about lifetimes of the events and attributes
• 9f4c66a Fix formatting for correct assertions in read_nodes_serde
• 6950ef7 Add GHA job to execute examples
• dbf9e3f Show XML Decl tracking in examples
• aab9452 Add writing a Decl event to the writer example
• 1573e05 Avoid trim_text(true) in the in-depth examples
• Additional commits viewable in compare view

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