1.7.0

• Add full PHP 7.1 Support (thanks @prolic)
• Allow sebastian/comparator ^2.0 (thanks @sebastianbergmann)
• Allow sebastian/recursion-context ^3.0 (thanks @sebastianbergmann)
• Allow \Error instances in ThrowPromise (thanks @jameshalsall)
• Support phpspec/phpspect ^3.2 (thanks @Sam-Burns)
• Fix failing builds (thanks @Sam-Burns)