* add custom Chai assertion "be.calledWithBatchedEvents" for testing onchange
* chore(api): blocks.update(id, data) method improved
- `blocks.update(id, data)` now can accept partial data object — it will update only passed properties, others will remain the same.
- `blocks.update(id, data)` now will trigger onChange with only `block-change` event.
- `blocks.update(id, data)` will return a promise with BlockAPI object of changed block.
* fix tests
* Update blocks.cy.ts
