UPDATED to refactor to be able to switch out data-source

[EwanValentine]

• UPDATED to remove references to the AWS SDK within the Model class itself. This decouples the schema and model logic from the database implementation.
• UPDATED the document client to handle the AWS specific tasks.
• ADDED a mock-client for testing purposes.

const mockClient = jedlik.MockClient({
  item: singleTestItem.
  list: arrayOfTestItems,
  createError: mockCreateError,
  updateError: mockUpdateError,
  deleteError: mockDeleteError,
});

const Model = jedlik.Model({
  table: 'test',
  client: mockClient,
});

class Customer extends Model {
  constructor({ id, name }) {
    this.id = id;
    this.name = name;
  }
}

This will interact with the test data instead of DynamoDB.

Steps to test

1. Run tests
2. Point a repo that uses this library at this, cloned locally and checked out to this branch. You can use file:../jedlik in the package.json.
3. Run the tests in that repo.
4. Check that the return types match what is expected in projects that use this library.

[harrim91]

I guess this is redundant now so I'm going to close it