chore(deps): update dependency jsonschema to v4.2.1

This MR contains the following updates:

Package	Update	Change
jsonschema	minor	==4.1.2 -> ==4.2.1

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Release Notes

Julian/jsonschema

v4.2.1

Compare Source

• Pin importlib.resources from below (#​877)

v4.2.0

Compare Source

• Use importlib.resources to load schemas (#​873)
• Ensure all elements of arrays are verified for uniqueness by uniqueItems (#​866)

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