added php-ca-fixer configuration

Ref: https://github.com/FriendsOfPHP/PHP-CS-Fixer#usage

.php_cs

@@ -0,0 +1,83 @@
+<?php
+
+$header = <<<EOF
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+This software consists of voluntary contributions made by many individuals
+and is licensed under the MIT license. For more information, see
+<http://www.doctrine-project.org>.
+EOF;
+
+Symfony\CS\Fixer\Contrib\HeaderCommentFixer::setHeader($header);
+
+$config = Symfony\CS\Config\Config::create()
+    ->level(Symfony\CS\FixerInterface::PSR2_LEVEL)
+    ->fixers([
+        'blankline_after_open_tag',
+        'empty_return',
+        'extra_empty_lines',
+        'function_typehint_space',
+        'join_function',
+        'method_argument_default_value',
+        'multiline_array_trailing_comma',
+        'no_blank_lines_after_class_opening',
+        'no_empty_lines_after_phpdocs',
+        'phpdoc_indent',
+        'phpdoc_no_access',
+        'phpdoc_no_empty_return',
+        'phpdoc_no_package',
+        'phpdoc_params',
+        'phpdoc_scalar',
+        'phpdoc_separation',
+        'phpdoc_trim',
+        'phpdoc_type_to_var',
+        'phpdoc_types',
+        'phpdoc_var_without_name',
+        'pre_increment',
+        'remove_leading_slash_use',
+        'remove_lines_between_uses',
+        'short_bool_cast',
+        'single_quote',
+        'spaces_after_semicolon',
+        'spaces_before_semicolon',
+        'spaces_cast',
+        'standardize_not_equal',
+        'ternary_spaces',
+        'trim_array_spaces',
+        'unneeded_control_parentheses',
+        'unused_use',
+        'whitespacy_lines',
+        'align_double_arrow',
+        'align_equals',
+        'concat_with_spaces',
+        'header_comment',
+        'logical_not_operators_with_spaces',
+        'logical_not_operators_with_successor_space',
+        'multiline_spaces_before_semicolon',
+        'newline_after_open_tag',
+        'ordered_use',
+        'php_unit_construct',
+        'phpdoc_order',
+        'short_array_syntax',
+    ]);
+
+if (null === $input->getArgument('path')) {
+    $config
+        ->finder(
+            Symfony\CS\Finder\DefaultFinder::create()
+                ->in('lib/')
+                ->in('tests/')
+        );
+}
+
+return $config;