chore: Add support for Django 6.0

[CuriousLearner]

Add support for Django 6.0 and release 3.3.0

[Copilot]

Pull request overview

This pull request adds support for Django 6.0 and releases version 3.3.0 of the django-phone-verify package. The changes update configuration files and package metadata to declare compatibility with Django 6.0 and Python 3.14, while maintaining backwards compatibility with earlier versions.

• Version bump from 3.2.0 to 3.3.0 across all package files
• Addition of Django 6.0 support with Python 3.12+ requirement
• Updated tox test matrix to include Django 6.0 testing configurations

Reviewed changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
tox.ini	Adds Django 6.0 test environment with Python 3.12-3.14 support and dependency specification
setup.py	Updates version to 3.3.0 and adds Django 5.2 and 6.0 framework classifiers
pyproject.toml	Updates version to 3.3.0 and adds Django 6.0 framework classifier
requirements/development.txt	Updates Django dependency from 5.2.8 to 6.0 for development environment
phone_verify/init.py	Updates package version string to 3.3.0
CHANGELOG.rst	Documents Django 6.0 support release with release date and Python version requirements

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