Bump sweet_xml from 0.6.6 to 0.7.2

[dependabot[bot]]

Bumps sweet_xml from 0.6.6 to 0.7.2.

Changelog

Sourced from sweet_xml's changelog.

[0.7.2] (2021-11-25)

Changed

• Improvement on the doc, notably warning that only XPath 1.0 queries are handled.

Added

• Contribution from @​tank-bohr: Added strict stream API with a more coherent overall behavior, and easier to handle failure behavior: stream!/2 and stream_tags!/2,3 are now available.

[0.7.1] (2021-08-25)

Changed

• @​J3RN noticed a breaking change due to the introduction of an opaque type
  Changed xmlElement from @opaque to @type

[0.7.0] (2021-07-02)

Changed

• Improvement on the doc

Added

• Added option to raise on DTD definitions

Commits

• 9f079d8 Added doc to the exceptions and strict stream API
• a21519e Changelog final update for 0.7.2 and git tag
• 9195888 Version bump in prevision, and changelog update
• 86d039d Correct error handling (#86)
• 66cb02c Moved contribution informations to the README.md
• 8d639f2 Updated CONTRIBUTING.md to refer to the centralized version
• 4f48b9e Added CONTRIBUTING.md
• 6a903c0 [DOC] minor improvement, subject: XPath version
• 6b3320a [VERSION] bumped to 0.7.1
• ba12cd9 [CHANGELOG] corrected links to v0.7.0 diff
• Additional commits viewable in compare view

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[dependabot[bot]]

A newer version of sweet_xml exists, but since this PR has been edited by someone other than Dependabot I haven't updated it. You'll get a PR for the updated version as normal once this PR is merged.