DEVX-5908 Implement Audio Connector functionality

[superchilled]

Description

• Defines a WebSocket class which provides a connect method for connecting streams to a WebSocket URI
• Updates the OpenTok and Client classes to work with the new WebSocket class
• Defines a custom exception type OpenTokWebSocketError for WebSocket-specific issues
• Adds a test for the WebSocket#connect method

Motivation and Context

It implements a feature in the SDK which is being added to the API.

How Has This Been Tested?

Added a test for the WebSocket#connect method

Example Output or Screenshots (if appropriate):

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.

[jeffswartz]

This API is currently in beta. Will it be shipping when this update to the Ruby SDK is released? If not, we should ship this with a beta release and mark it as beta (in the docs and in the release tag).

Also, will the REST API include get and list methods when this ships (after beta)? We should add methods for those.

[pardel]

@jeffswartz we'll keep this on-hold for now and will ship it sometime in Q4 one the feature is GA.