Remove inline if clauses

src/MDLicensesSet.php

@@ -39,7 +39,9 @@ final class MDLicensesSet extends MDValueSet {
      * @return string|boolean
      */
     final public static function checkLicenseAvailable(string $license) {
-        if (isset(self::AVAILABLE_LICENSES[$license])) return self::AVAILABLE_LICENSES[$license];
+        if (isset(self::AVAILABLE_LICENSES[$license])) {
+            return self::AVAILABLE_LICENSES[$license];
+        }
         return false;
 
     }