Update libxml requirement from 0.2.12 to 0.3.1

[dependabot]

Updates the requirements on libxml to permit the latest version.

Changelog

Sourced from libxml's changelog.

[0.3.1] 2022-26-03

• Added: Thanks to @​lepapareil, @​hurlenko and @​ballsteve for contributing installation docs for Windows and MacOS.
• Added: Node and RoNode now have has_property (alias has_attribute) and has_property_ns (alias has_attribute_ns) to check attribute presence without allocating the value.
• Added: xpath::is_well_formed_xpath, thanks @​bcpeinhardt !

[0.3.0] 2021-27-05

• Change Parser::parse_file/string_with_encoding to Parser::parse_file/string_with_options.

• Introduce ParserOptions which encapsulates the forced encoding setting together with libxml2s HTML and XML parser options.

• For systems without a pkg-config capability, we now use the LIBXML2 environment variable to detect an installed libxml2 toolchain. (thanks @​przygienda !)

[0.2.16] 2021-31-01

Added

• More element-oriented methods: get_next_element_sibling, get_prev_element_sibling, get_last_element_child, added to both Node and RoNode.
• Document::ronode_to_string for printing read-only nodes
• RoNode::node_ptr for getting the internal libxml2 raw pointer of a read-only node

[0.2.15] 2020-28-09

Thanks to @​JoshuaNitschke for contributing OS-based package detection for the native libxml2! Also thanks to @​coding-yogi, @​ignatenkobrain and @​simoin for investigating platform-specific issues with this crate, some of which expect resolution in upcoming versions.

Added

• Support for x64-Windows use via the vcpkg package manager (with new CI monitoring via appveyor).

Changed

• Added back an Error trait implementation for XmlParseError

Removed

• Dropped a large number of memory layout tests that were auto-generated by bindgen, until we have a more sophisticated test-generation setup that can enforce multiple architectures. Ideally this has no day-to-day impact and just makes portability easier in the short-term.

[0.2.14] 2020-27-03

Changed

More consistently use c_char to successfully compile on ARM targets

[0.2.13] 2020-16-01

Thanks to @​jangernert for the upgrades to Document serialization. Thanks to @​lweberk for contributing the Schema featureset and to @​cbarber for refining the FFI interop.

Added

... (truncated)

Commits

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