services:
    grumphp.util.composer:
        class: GrumPHP\Util\Composer

    grumphp.util.filesystem:
        class: GrumPHP\Util\Filesystem

    grumphp.util.phpversion:
        class: GrumPHP\Util\PhpVersion
        arguments:
            -
              5.6: '2018-12-31 23:59:59'
              7.0: '2018-12-03 23:59:59'
              7.1: '2019-12-01 23:59:59'

services:
    grumphp.util.composer:
        class: GrumPHP\Util\Composer

    grumphp.util.filesystem:
        class: GrumPHP\Util\Filesystem

    grumphp.util.phpversion:
        class: GrumPHP\Util\PhpVersion
        arguments:
            -
              '5.6': '2018-12-31 23:59:59'
              '7.0': '2018-12-03 23:59:59'
              '7.1': '2019-12-01 23:59:59'

Fix parse exceptions: "Numeric keys are not supported"
Fix parse exceptions: "Numeric keys are not supported"

due to deprecation in Symfony's Yaml component v4
