Bump supported intl-tel-input version

Problem/Motivation

This module currently depends on intl-tel-input v16.0.0. The current supported version available is intl-tel-input v25.3.1.

Proposed resolution

Get the project up-to-date. Support the latest and one back.

Remaining tasks

• Update javascript implementation.
• Verify support with Telephone Validation → .
• Write tests supporting the latest and one major version back.
• Update documentation.