v2.0.0-rc.1

First release candidate of V2! 🎉

What's Changed

• Bump shivammathur/setup-php from 2.11.0 to 2.13.0 by @dependabot in #74
• Bump shivammathur/setup-php from 2.13.0 to 2.14.0 by @dependabot in #75
• Version 2 prototype by @remorhaz in #78

Full Changelog: 1.5.2...v2.0.0-rc.1