Set constant visibility in tests to private where possible.

Author: derrabus

Tests/Encoder/Argon2iPasswordEncoderTest.php

@@ -21,7 +21,7 @@
  */
 class Argon2iPasswordEncoderTest extends TestCase
 {
-    const PASSWORD = 'password';
+    private const PASSWORD = 'password';
 
     protected function setUp(): void
     {

Tests/Encoder/BCryptPasswordEncoderTest.php

@@ -21,8 +21,8 @@
  */
 class BCryptPasswordEncoderTest extends TestCase
 {
-    const PASSWORD = 'password';
-    const VALID_COST = '04';
+    private const PASSWORD = 'password';
+    private const VALID_COST = '04';
 
     public function testCostBelowRange()
     {

Tests/Validator/Constraints/UserPasswordValidatorTest.php

@@ -23,8 +23,8 @@
  */
 abstract class UserPasswordValidatorTest extends ConstraintValidatorTestCase
 {
-    const PASSWORD = 's3Cr3t';
-    const SALT = '^S4lt$';
+    private const PASSWORD = 's3Cr3t';
+    private const SALT = '^S4lt$';
 
     /**
      * @var TokenStorageInterface