Use PHP 8.4 for the PHP 7.4 integration test

Run PHP 8.4 integration tests

Disable fail-fast

PHP 8.4 currently fails because the version is installed version
is too old. Avoid cancelling other CI jobs because of that.

Add PHP 8.4 to CI matrix

Not using it in the integration tests yet.

Updated actions/checkout to v4

Declare more precise phpdoc types (#993)

Use PHP 8.3 for more CI jobs

Make phpunit fail on deprecation warnings (#989)

(cherry picked from commit 4d36e9c16f4820c2ed9360bc818982f3c02a08f5)

Pass --dry-run to php-cs-fixer

Apparently it only returns the correct exit code with the
--dry-run option.

Add PHP 8.3 to CI matrix

Add php-cs-fixer CI job

Run integration test against PHP 8.3

Update PHP versions in workflow

Raise minimum PHP version to PHP 7.4

Update main.yml to use GitHub Actions V3

Updates the GitHub Actions from V2 to V3

(cherry picked from commit 1d0748ad35201d483816634dd4bfe55a6f26d857)

Run integration tests against PHP 8.2 test suite

Declare list types (#907)

Closes #905

Test PHP 8.2 in CI

Drop support for running on PHP 7.0

Update integration test target to 8.1

Try to pass --ignore-platform-req=php on 8.1 only

Pass --ignore-platform-req=php

Add PHP 8.1 to GH actions

Try to re-enable coveralls

Add GitHub Actions workflow (#740)