Update Toloka-kit to version 1.0

This release updates Toloka-kit to version 1.0. The release fixed a typo in one of the observers, which caused previous versions of abulafia to crash.

Improvements and bug fixes

Minor adjustments to the LabelledSegmentationVerification interface.
Updates to documentation.
Improved error messages when validating tasks uploaded to Toloka.

Initial release

Initial release of the tool with limited tests.