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- Changed the comparison to make accurate and standard more accurate,
although fast gets less accurate as a result.
- Changed usage of deprecated `pkg_resources` package to `importlib.metadata`.
- A `use_replace` flag was added to the `XMLFormatter` by Thomas Pfitzinger.
It changes text replacement from delete and insert tags to a replace tag.
It's not currently accessaible thtough the CLI, the question is it is better
to add a new formatter name, or an option to pass in formatter flags.
- Added option to XMLFormatter to use replace tags
- in _make_diff_tags after diffing, neighboring delete/insert diffs are joined to a replace tag
- the deleted text is added as an attribute ("old-text")
- the inserted text is the element's text