Set strict parameter of in_array to true where possible

Author: alexandre-daubois

Data/Generator/RegionDataGenerator.php

@@ -242,7 +242,7 @@ private function generateAlpha2ToNumericMapping(ArrayAccessibleResourceBundle $m
                 continue;
             }
 
-            if (\in_array($alias, self::WITHDRAWN_CODES)) {
+            if (\in_array($alias, self::WITHDRAWN_CODES, true)) {
                 continue;
             }