fix toJsonObject export

[fat23cat]

The original @aws-appsync/utils package allows to import toJsonObject in two ways:

import { toJsonObject } from '@aws-appsync/utils/rds';

const result = toJsonObject(ctx.result);

import { util } from '@aws-appsync/utils';

const result = util.rds.toJsonObject(ctx.result);

The change allows to import toJsonObject in both ways as it does the original package

[simonrw]

Hi, thanks for raising this PR!

I would normally ask you to add an integration test, however this functionality requires changes in the test execution plumbing. It's a little hacky and needs tidying up.

(If you are interested in further contributions, the test infrastructure code could do with a review from someone more familiar with JavaScript than me! 😜 )

Are you ok if I push a commit updating the tests to cover this change?

[fat23cat]

Are you ok if I push a commit updating the tests to cover this change?

Hi! Sure, am ok with it!

[simonrw]

Also: note the localstack-test test is expected to fail for forks, since forks don't have access to the repository secrets that we need. We probably need to think about how to handle that case.

Thanks for making this change!