Apply linting fixes

Author: onigoetz

.gitignore

@@ -9,6 +9,7 @@ static-single
 /build
 .phpunit.result.cache
 .php_cs.cache
+.php-cs-fixer.cache
 coverage.clover
 test-report.xml
 

.php-cs-fixer.php

@@ -0,0 +1,51 @@
+<?php
+
+$finder = PhpCsFixer\Finder::create()
+    ->exclude('vendor')
+    ->exclude('templates')
+    ->exclude('node_modules')
+    ->in(__DIR__);
+
+$config = new PhpCsFixer\Config();
+$config->setRules([
+        // Presets
+        '@PSR2' => true,
+        '@PHP80Migration' => true,
+        '@PhpCsFixer' => true,
+
+        // Disable rules
+        'explicit_string_variable' => false,
+        'yoda_style' => false,
+        'php_unit_internal_class' => false,
+        'php_unit_test_class_requires_covers' => false,
+        'phpdoc_align' => false,
+        'multiline_whitespace_before_semicolons' => false,
+
+        // Namespace configuration
+        'no_blank_lines_before_namespace' => true,
+        'single_blank_line_before_namespace' => false,
+        'blank_line_after_opening_tag' => false,
+        'linebreak_after_opening_tag' => false,
+
+        // Options tweaks
+        'echo_tag_syntax' => [
+            'format' => 'short'
+        ],
+        'concat_space' => ['spacing' => 'one'],
+        'ordered_class_elements' => [
+            'order' => [
+                'use_trait',
+                'constant_public',
+                'constant_protected',
+                'constant_private',
+                'property_public',
+                'property_protected',
+                'property_private',
+                'construct',
+                'method'
+            ]
+        ]
+]);
+$config->setFinder($finder);
+
+return $config;