Add new messages fields

[SecondeJK]

This PR adds new available fields as added by the API Spec

Description

You can now set a TTL (Time-to-live) on MMS Objects. This is done with $message->setTtl(300); Please see the API spec for more information.

Motivation and Context

Evolution of Vonage products.

How Has This Been Tested?

Tests have been updated to check the output sent to the API

Example Output or Screenshots (if appropriate):

Types of changes

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

Checklist:

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

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 88.23529% with 4 lines in your changes missing coverage. Please review.

Project coverage is 80.00%. Comparing base (ba6b02a) to head (7278f1c). Report is 34 commits behind head on main.

:exclamation: Current head 7278f1c differs from pull request most recent head 0bec49c

Please upload reports for the commit 0bec49c to get more accurate results.

Files	Patch %	Lines
src/Messages/MessageTraits/ContextTrait.php	60.00%	2 Missing :warning:
src/Messages/MessageTraits/TtlTrait.php	60.00%	2 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #486 +/- ## ============================================ + Coverage 79.18% 80.00% +0.81% - Complexity 2371 2635 +264 ============================================ Files 218 240 +22 Lines 6356 7076 +720 ============================================ + Hits 5033 5661 +628 - Misses 1323 1415 +92 ```

:umbrella: View full report in Codecov by Sentry.
:loudspeaker: Have feedback on the report? Share it here.