Update Composer, update everything

vendor/psy/psysh/test/fixtures/config.php

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+<?php
+
+/*
+ * This file is part of Psy Shell.
+ *
+ * (c) 2012-2018 Justin Hileman
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+$config->setRuntimeDir(\sys_get_temp_dir() . '/psysh_test/withconfig/temp');
+
+return [
+    'useReadline'       => true,
+    'usePcntl'          => false,
+    'requireSemicolons' => false,
+    'useUnicode'        => true,
+    'errorLoggingLevel' => E_ALL & ~E_NOTICE,
+];

vendor/psy/psysh/test/fixtures/default/.config/psysh/config.php

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+<?php

vendor/psy/psysh/test/fixtures/empty.php

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+<?php
+
+/*
+ * This file is part of Psy Shell.
+ *
+ * (c) 2012-2018 Justin Hileman
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/* this space intentionally left blank */

vendor/psy/psysh/test/fixtures/legacy/.psysh/rc.php

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+<?php

vendor/psy/psysh/test/fixtures/mixed/.psysh/config.php

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+<?php

vendor/psy/psysh/test/fixtures/mixed/.psysh/rc.php

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+<?php

vendor/psy/psysh/test/fixtures/project/.psysh.php

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+<?php
+
+/*
+ * This file is part of Psy Shell
+ *
+ * (c) 2012-2017 Justin Hileman
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+return array(
+    'useReadline'       => false,
+    'usePcntl'          => true,
+    'requireSemicolons' => true,
+    'useUnicode'        => false,
+);