• Feature: Support PHP 8.1 and PHP 8.2.
  (#47 by @SimonFrings and #52 by @WyriHaximus)

• Minor documentation improvements.
  (#48 by @SimonFrings and #51 by @nhedger)

• Update test suite and use GitHub actions for continuous integration (CI).
  (#45 and #49 by @SimonFrings and #54 by @clue)

• Documentation: Align DocBlock Promise return types
  (#44 by @WyriHaximus)

• Feature: Forward compatibility with react/promise 3.
  (#39 by @WyriHaximus)

• Add .gitattributes to exclude dev files from exports.
  (#40 by @reedy)

• Improve test suite, update to support PHP 8 and PHPUnit 9.3.
  (#41 and #43 by @SimonFrings and #42 by @WyriHaximus)

• First stable LTS release, now following SemVer.
  We'd like to emphasize that this component is production ready and battle-tested.
  We plan to support all long-term support (LTS) releases for at least 24 months,
  so you have a rock-solid foundation to build on top of.

Contains no other changes, so it's actually fully compatible with the v0.6.0 release.

• Feature / BC break: Add support for getMultiple(), setMultiple(), deleteMultiple(), clear() and has()
  supporting multiple cache items (inspired by PSR-16).
  (#32 by @krlv and #37 by @clue)

• Documentation for TTL precision with millisecond accuracy or below and
  use high-resolution timer for cache TTL on PHP 7.3+.
  (#35 and #38 by @clue)

• Improve API documentation and allow legacy HHVM to fail in Travis CI config.
  (#34 and #36 by @clue)

• Prefix all global functions calls with \ to skip the look up and resolve process and go straight to the global function.
  (#31 by @WyriHaximus)

• Improve documentation by describing what is expected of a class implementing CacheInterface.
  (#21, #22, #23, #27 by @WyriHaximus)

• Implemented (optional) Least Recently Used (LRU) cache algorithm for ArrayCache.
  (#26 by @clue)

• Added support for cache expiration (TTL).
  (#29 by @clue and @WyriHaximus)

• Renamed remove to delete making it more in line with PSR-16.
  (#30 by @clue)

• Improve documentation with usage and installation instructions
  (#10 by @clue)

• Improve test suite by adding PHPUnit to require-dev and
  add forward compatibility with PHPUnit 5 and PHPUnit 6 and
  sanitize Composer autoload paths
  (#14 by @shaunbramley and #12 and #18 by @clue)

• Repository maintenance, split off from main repo, improve test suite and documentation
• First class support for PHP7 and HHVM (#9 by @clue)
• Adjust compatibility to 5.3 (#7 by @clue)

• BC break: Bump minimum PHP version to PHP 5.4, remove 5.3 specific hacks
• BC break: Update to React/Promise 2.0
• Dependency: Autoloading and filesystem structure now PSR-4 instead of PSR-0

• Version bump