DEVX-5649 Add SIP Video Outbound flag

[superchilled]

This PR provides clarity around use of the video option when making a SIP call using the Sip#dial method.

Description

Including '"video":"true" as part of the JSON payload for call to the /dial API endpoint allows video to be included in the OpenTok stream that is sent to the OpenTok session. This property can be included in the payload by adding it as an option in the opts hash passed to Sip#dial method. No changes were required to the implementation of the method, since the method can already accept video as a key in the opts hash (the method is very lenient with regards to keys that can be included in the hash).

The only changes were to the code comments in the Sip#dial method definition, and to the relevant specs.

Motivation and Context

Ongoing development to roll out new API features.

How Has This Been Tested?

Existing spec has been updated to include the option for video. Test suite has been run to pass.

Example Output or Screenshots (if appropriate):

Types of changes

• Bug fix (non-breaking change which fixes an issue)

Note: not technically a bug-fix, but not technically implementing a new feature either, but clarifies/ highlights the ability to use a new feature.

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.

[pardel]

Looking great! Thank you! 🙇

[jeffswartz]

Looks good. But we should bump the version to 4.3.0 in ../lib/opentok/version.rb". Also, please target the dev branch. I have some docs edits (unrelated to this) that I would like to add. (I'll have a PR later today.)

The base branch was changed.

[superchilled]

@jeffswartz Have switched the base branch for the PR to dev. Regarding the version bump, this PR is going to be one of a number of updates over the next week or so. We're intending to bump the version once all the changes are in dev prior to release.