Issue #2493913 by iMiksu: Update mikey179/vfsstream to the latest stable release

core/composer.lock

core/vendor/composer/installed.json

core/vendor/mikey179/vfsStream/.coveralls.yml

core/vendor/mikey179/vfsStream/.gitignore

core/vendor/mikey179/vfsStream/.travis.yml

core/vendor/mikey179/vfsStream/CHANGELOG.md

core/vendor/mikey179/vfsStream/LICENSE

core/vendor/mikey179/vfsStream/composer.json

core/vendor/mikey179/vfsStream/examples/Example.php

...dor/mikey179/vfsStream/examples/ExampleTestCaseOldWay.php

...ey179/vfsStream/examples/ExampleTestCaseWithVfsStream.php

core/vendor/mikey179/vfsStream/examples/FailureExample.php

...or/mikey179/vfsStream/examples/FailureExampleTestCase.php

...y179/vfsStream/examples/FileModeExampleTestCaseOldWay.php

...or/mikey179/vfsStream/examples/FilePermissionsExample.php

...179/vfsStream/examples/FilePermissionsExampleTestCase.php

core/vendor/mikey179/vfsStream/examples/FilemodeExample.php

...sStream/examples/FilemodeExampleTestCaseWithVfsStream.php

core/vendor/mikey179/vfsStream/examples/bootstrap.php

core/vendor/mikey179/vfsStream/phpdoc.dist.xml