Update dependency xmlschema to v3.4.2

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
xmlschema	==3.3.2 -> ==3.4.2

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Release Notes

sissaschool/xmlschema (xmlschema)

v3.4.2

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• Fix other failing URL normalization tests
• Avoid the use of sys.version_info for checking results, better to extend the check to more values.

v3.4.1

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• Fix failing URL normalization tests (issue #​416)
• Disable protocols checking with elementpath v4.5.0

v3.4.0

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• Extended ModelVisitor to make it usable as an helper class for generating content
  (issues #​405 and #​408)

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 99.64%. Comparing base (aad3e0b) to head (0623175).
Report is 1 commits behind head on master.

Additional details and impacted files

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  Coverage   99.64%   99.64%           
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  Files           4        4           
  Lines         279      279           
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  Hits          278      278           
  Misses          1        1