Merge pull request mike-oakley#36 from mike-oakley/u/mike/maintenance

chore: Update dependencies to resolve security advisories.

chore: Bump version.

Merge pull request mike-oakley#21 from mike-oakley/u/mike/3.8-type-fix

fix: Make type hints compatible with Python 3.8

chore: Bump version

Bump version

Merge pull request mike-oakley#14 from mike-oakley/u/mike/fix

fix: Add top-level datatype export.

Merge pull request mike-oakley#13 from mike-oakley/u/mike/fix-datatyp…

…e-export

fix: Export datatype.

Merge pull request mike-oakley#12 from mike-oakley/u/mike/infer-schem…

…a-version

feat: Support parsing with schema version inference.

Merge pull request mike-oakley#11 from mike-oakley/u/mike/fix-relativ…

…e-url-support

fix: Relative URL support and Callbacks forward references.

Merge pull request mike-oakley#10 from mike-oakley/test-release

fix: Only trigger test release manually.