v0.15.1: Bug fixes, official drop of support of php <7

What's Changed

• travis ci upgrades by @tedivm in #357
• [Driver/Composite] Fix PHP 7.2 failure by @siwinski in #356
• Apc Driver: Check for 'apc.enable_cli' in cli calls by @Biont in #368
• Add option to limit number of items stored in ephemeral driver. by @mbaynton in #370
• Fixing some phpdoc errors by @design1online in #371
• Drop PHP5 and HHVM, add more PHP7 versions, upgrade development dependencies by @tedivm in #373
• Fix fatal error with auto classloader when APC(U)Iterator class does … by @iclukas in #378

New Contributors

• @siwinski made their first contribution in #356
• @Biont made their first contribution in #368
• @mbaynton made their first contribution in #370
• @design1online made their first contribution in #371

Full Changelog: v0.14.2...v0.15.1