Added support for 8.0 and 8.1 rules

Removed deprecated rule `no_extra_blank_lines` for `use_traits` and added alternative
Added declare_strict_types rule for 8.1+ projects

Author: peter-mein-mollie

src/PhpCsFixer/Rules.php

@@ -9,11 +9,17 @@
  */
 class Rules
 {
+    /**
+     * @deprecated php version 7.1 is no longer supported
+     */
     public static function getForPhp71(array $overriddenRules = []): array
     {
         return array_merge(self::getBaseRules(), $overriddenRules);
     }
 
+    /**
+     * @deprecated php version 7.2 is no longer supported
+     */
     public static function getForPhp72(array $overriddenRules = []): array
     {
         $specific72Rules = [
@@ -23,6 +29,9 @@ public static function getForPhp72(array $overriddenRules = []): array
         return array_merge(self::getForPhp71($specific72Rules), $overriddenRules);
     }
 
+    /**
+     * @deprecated php version 7.3 is no longer supported
+     */
     public static function getForPhp73(array $overriddenRules = []): array
     {
         $specific73Rules = [
@@ -39,6 +48,33 @@ public static function getForPhp73(array $overriddenRules = []): array
         return array_merge(self::getForPhp72($specific73Rules), $overriddenRules);
     }
 
+    public static function getForPhp74(array $overriddenRules = []): array
+    {
+        $specific74Rules = [
+            // At the moment there are no specific 7.4 rules or configurations
+        ];
+
+        return array_merge(self::getForPhp73($specific74Rules), $overriddenRules);
+    }
+
+    public static function getForPhp80(array $overriddenRules = []): array
+    {
+        $specific80Rules = [
+            // At the moment there are no specific 8.0 rules or configurations
+        ];
+
+        return array_merge(self::getForPhp74($specific80Rules), $overriddenRules);
+    }
+
+    public static function getForPhp81(array $overriddenRules = []): array
+    {
+        $specific81Rules = [
+            'declare_strict_types' => true,
+        ];
+
+        return array_merge(self::getForPhp80($specific81Rules), $overriddenRules);
+    }
+
     private static function getBaseRules(): array
     {
         return [
@@ -97,6 +133,11 @@ private static function getBaseRules(): array
                     // TODO: Add 'use' when php-cs-fixer #3582 is fixed
                 ],
             ],
+            'class_attributes_separation' => [
+                'elements' => [
+                    'trait_import' => 'none',
+                ],
+            ],
             'no_null_property_initialization' => true,
             'no_superfluous_elseif' => true,
             'no_superfluous_phpdoc_tags' => true,