PHP 8 Support

Merge pull request #2 from acelot/php-8-support

PHP 8 support

2.3.1

`Resolver::class` is added to aliases

2.3.0: New feature `unshare` and `unshareAll`

- Removes the resolved object from shared items. This is useful when you want the object to be re-resolved.

2.2.0

Share self as ContainerInterface

PSR-11 ContainerInterface

2.1.0

Implemented PSR-11 ContainerInterface

2.0.0: BC: `bind()` replaced by `withDefinition()` immutable method

- Added some useful methods in definitions
- New DefinitionException
- New tests
- Composer cache for Travis CI
- Excluded unnecessary files from composer package

First release + new feature: Instance sharing

1.0.0

Update README

0.1.0

License changed to MIT