Merge branch 'datetime' into 2.1.x

# Conflicts:
#	tests/ValidatorTest.php

Author: natanfelles

src/Validator.php

@@ -403,8 +403,11 @@ public static function datetime(
         if ($data === null) {
             return false;
         }
-        $data = \DateTime::createFromFormat($format, $data);
-        if ($data === false) {
+        $datetime = \DateTime::createFromFormat($format, $data);
+        if ($datetime === false) {
+            return false;
+        }
+        if ($datetime->format($format) !== $data) {
             return false;
         }
         $lastErrors = \DateTime::getLastErrors();

tests/ValidatorTest.php

@@ -179,6 +179,9 @@ public function testDatetime() : void
         self::assertFalse(Validator::datetime('foo', [
             'foo' => '2022-02-29 25:10:10',
         ]));
+        self::assertFalse(Validator::datetime('foo', [
+            'foo' => '023-01-10',
+        ], 'Y-m-d'));
     }
 
     public function testEquals() : void