Update package to 1.3.0.
Changes since 1.2.0:
1.3.0:
- Added full type hints; Value and Outcome are now generic classes
- Added Maybe type alias as a union of Value[T] and Error
- Added typed __all__ exports and marked __version__ as a public constant
- Functions that do not return are now captured as Error
- Added pyright --verifytypes to CI; strict mypy mode enabled
Signed-off-by: Alexandru Ardelean <alex@shruggie.ro>