Make return type check PHPCS v3 compat

Fixes #16

Author: gmazzap

CHANGELOG.md

@@ -2,6 +2,7 @@
 
 ## NOT RELEASED
 - Fixed false positive "missing argument type declaration" when param are passed by-reference.
+- Make `ReturnTypeDeclarationSniff` compatible with PHPCS 3.3
 
 ## 0.13.2 
 - Changed "squizlabs/php_codesniffer" in composer.json to "~3.2.3"

Inpsyde/Sniffs/CodeQuality/ReturnTypeDeclarationSniff.php

@@ -234,6 +234,11 @@ private function maybeGeneratorErrors(
      */
     private function returnTypeContent(File $file, int $functionPosition): string
     {
+        $info = $file->getMethodProperties($functionPosition);
+        if (array_key_exists('return_type', $info) && is_string($info['return_type'])) {
+            return ltrim($info['return_type'], '\\');
+        }
+
         $tokens = $file->getTokens();
         $returnTypeToken = $file->findNext(
             [T_RETURN_TYPE],

composer.json

@@ -28,7 +28,7 @@
   "minimum-stability": "stable",
   "require": {
     "php": ">=7.0",
-    "squizlabs/php_codesniffer": "~3.2.3",
+    "squizlabs/php_codesniffer": "^3",
     "dealerdirect/phpcodesniffer-composer-installer": "^0.4",
     "wp-coding-standards/wpcs": "^0.14",
     "automattic/phpcs-neutron-standard": "^1",