IPLAYER-43503: Fix typo in and optionify arg passed to toJson method declaration file.

[yusuf963]

Description

Motivation and Context

Fix typo in and optionlify arg passed to toJson method declaration file

• issue link for client.retry() typo : client.retry() method is not typed correctly in the declaration file #45
• to.Json method optional argument issue link Make the arg for toJson() optional #46

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My code follows the code style of this project.
• [] My change requires a change to the documentation.
• [ ] I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.~
• [ ] I have added tests to cover my changes.
• All new and existing tests passed.

[simongregory]

LGTM! retries should be retry and the intention for opts to be potentially empty is implied on the first line of the middleware itself.