Replace calls to deprecated PHPUnit assertion assertRegExp with assertMatchesRegularExpression

[settermjd]

assertRegExp is deprecated in PHPUnit 10 and will be replaced by assertMatchesRegularExpression. This PR replaces the six calls to the former assertion with the latter.

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Depends On

This PR depends on #90.

[robinske]

This library is no longer actively maintained. The Authy API has been replaced with the Twilio Verify API. Twilio will support the Authy API through November 1, 2022 for SMS/Voice. After this date, we’ll start to deprecate the service for SMS/Voice. Any requests sent to the API after May 1, 2023, will automatically receive an error. Push and TOTP will continue to be supported through July 2023.

Learn more about migrating from Authy to Verify.

Please visit the Twilio Docs for:

• Verify + PHP (Laravel) quickstart
• Twilio PHP helper library
• Verify API reference

Please direct any questions to Twilio Support. Thank you!