Raise awareness of current Russia-Ukraine situation, targeting Russian 🇷🇺  readers

Updates the CHANGELOG.md to set the release date.

Raise awareness of current Russia-Ukraine situation, targeting Russian 🇷🇺  readers

Raise awareness of current Russia-Ukraine situation, targeting Russian 🇷🇺  readers

Raise awareness of current Russia-Ukraine situation, targeting Russian 🇷🇺  readers

Merge pull request #196 from Ocramius/feature/a-message-to-russian-people-stand-against-war-stand-with-ukraine

Raise awareness of current Russia-Ukraine situation, targeting Russian 🇷🇺 readers

This message is intended to fight misinformation around the Russian aggression of
Ukraine, precisely for Russian residents that are kept unaware of the atrocities
that Vladimir Putin started in February 2022.

Please do help spread this message: good people will try helping, but they first
need to know.

Ref: https://github.com/vshymanskyy/StandWithUkraine/blob/6cedba904e888c0188e1a31b1463618112e41bfd/docs/ToRussianPeople.md
Ref: https://github.com/vshymanskyy/StandWithUkraine/issues/4

Updates the CHANGELOG.md file to add a changelog entry for a new 2.4.1 version.

Updates the CHANGELOG.md to set the release date.

PHP 8.1 compatibility, upgrade CI dependencies, enable dependabot

Require operating under latest `composer-runtime-api`, effectively excluding older `composer/composer` releases

Updates the CHANGELOG.md file to add a changelog entry for a new 2.3.1 version.

Updates the CHANGELOG.md file to add a changelog entry for a new 2.4.0 version.

Updates the CHANGELOG.md to set the release date.

Update `.gitattributes` to avoid exporting phpcs artifacts

Updates the CHANGELOG.md file to add a changelog entry for a new 2.3.0 version.

Drop `php:^7.4.7` support - switch to only `php:~8.0.0`

If you require to run both PHP 7 and PHP 8 in different
environments, lock onto `ocramius/package-versions:2.1.0`,
which supports both.

Add `php:8.0.*` support

As per https://github.com/composer/composer/issues/9302, this is a known composer bug
that is not that relevant for this package for multiple reasons:

 1. the only real dependencies are `php` and `composer-runtime-api`, which are fixed
 2. we upgrade all dependencies whenever possible, and restrict the range too, via
    dependabot, so we don't keep old dependencies around for too long anyway

This patch explicitly adds `php:~8.0.0` support along with `php:^7.4.7`.

`phpunit/phpunit` had to also be upgraded, so that it does not contain symbols
that clash with the `php:8.0.0` parser BC breaks.

To do so, we had to disable `infection/infection` reporting for now, as the
mutation testing setup is not yet capable of working with `phpunit/phpunit:^9.3`.

In addition to that, we now actively replace `composer/package-versions-deprecated`,
which is constantly causing issues in installation, and which is fully replaced by
this specific package. If you run `composer/composer:^2.0` and `php:8.0.0`, there is
no reason to use `composer/package-versions-deprecated` anyway.

Please note that the support for PHP is limited to `php:^7.4.7 || php:~8.0.0`: `php:8.1.0`
is **NOT** supported by this release, as the upstream ecosystem is just too unstable
and regularly breaks BC in multiple ways. Once `php:8.1.0-rc2` is out (possibly next year),
work will be done to support that too.

Updates the CHANGELOG.md to set the release date.

Convert to `"type": "library"` composer package

Ensure we ware on a `1.x`-compatible branch when starting tests, or else `composer install` will fail in tests

Merge pull request #155 from Ocramius/fix/#138-#142-#152-#107-remove-the-need-for-generating-version-class

BC break: removed deprecated `PackageVersions\Versions::ROOT_PACKAGE_NAME` constant