[VBLOCKS-2964] Update `@twilio/voice-errors` to `1.6.0`

[mhuynh5757]

Submission Checklist

• [x] Updated the CHANGELOG.md to reflect any feature, bug fixes, or known issues made in the source code
• [x] Tested code changes and observed expected behavior in the example app
• [x] Performed a visual inspection of the Files changed tab prior to submitting the pull request for review to ensure proper usage of the style guide

All third-party contributors acknowledge that any contributions they provide will be made under the same open-source license that the open-source project is provided under.

• [x] I acknowledge that all my contributions will be made under the project's license.

Description

This PR updates the @twilio/voice-errors package to 1.6.0. It also adds relevant CallMessage errors to the generated errors: 31210 and 31211.

Breakdown

• Update error package.
• Add error generation unit tests.
• Refactor error generation to be conducive of unit testing.

Validation

• New unit tests.
• For the CallMessage error codes, manual testing and reproduction of those errors.

Scenarios:

const validMessage = new CallMessage({
  content: 'some string',
  contentType: 'application/json',
  messageType: 'user-defined-message',
});

const largeMessage = new CallMessage({
  content: MESSAGE_CONTENT_EXCEEDING_MAX_PAYLOAD_SIZE,
  // this is a 10k+ length string
  contentType: 'application/json',
  messageType: 'user-defined-message',
});

const invalidContentTypeMessage = new CallMessage({
  content: { foo: 'bar' },
  contentType: 'not a real content type foobar',
  messageType: 'user-defined-message',
});

const invalidMessageTypeMessage = new CallMessage({
  content: { foo: 'bar' },
  contentType: 'application/json',
  messageType: 'not a real message type foobar',
});

Results:

Scenario	iOS	Android
Valid Message	Success, no error	Success, no error
Large Message	Fail, neither error callback or success callback fired	Success, error raised to JS
Invalid Content Type	Fail? success callback fired	Fail? success callback fired
Invalid Message Type	Success, error raised to JS	Success, error raised to JS

Additional Notes

N/A