v4.6.0 - PHP 7.4 and Guzzle 7 Compatibility

As an interim release for supporting PSR-18 at a base, this release adds support for Guzzle 7 as well as some internal fixes for supporting up to PHP 7.4

Added

• Supports PHP 7.4 without any warnings
• Supports Guzzle 7

Changed

• Updated dependencies
• PSR-12 compliant
• Bumped minimum version of PHP to 7.2, per our support SLA
• Unit tests moved to the newer format for PHPUnit as it was upgraded

Removed

• No longer support PHAR as a distribution type