Merge branch '6.4' into 7.0

* 6.4:
  fix typo
  Add types to private and internal properties
  [Workflow] Cleaning code
  [Scheduler] Fix NPE in debug:scheduler command

Author: nicolas-grekas

Debug/OptionsResolverIntrospector.php

@@ -22,7 +22,7 @@
  */
 class OptionsResolverIntrospector
 {
-    private $get;
+    private \Closure $get;
 
     public function __construct(OptionsResolver $optionsResolver)
     {

OptionConfigurator.php

@@ -15,8 +15,8 @@
 
 final class OptionConfigurator
 {
-    private $name;
-    private $resolver;
+    private string $name;
+    private OptionsResolver $resolver;
 
     public function __construct(string $name, OptionsResolver $resolver)
     {

OptionsResolver.php

@@ -50,73 +50,73 @@ class OptionsResolver implements Options
     /**
      * The names of all defined options.
      */
-    private $defined = [];
+    private array $defined = [];
 
     /**
      * The default option values.
      */
-    private $defaults = [];
+    private array $defaults = [];
 
     /**
      * A list of closure for nested options.
      *
      * @var \Closure[][]
      */
-    private $nested = [];
+    private array $nested = [];
 
     /**
      * The names of required options.
      */
-    private $required = [];
+    private array $required = [];
 
     /**
      * The resolved option values.
      */
-    private $resolved = [];
+    private array $resolved = [];
 
     /**
      * A list of normalizer closures.
      *
      * @var \Closure[][]
      */
-    private $normalizers = [];
+    private array $normalizers = [];
 
     /**
      * A list of accepted values for each option.
      */
-    private $allowedValues = [];
+    private array $allowedValues = [];
 
     /**
      * A list of accepted types for each option.
      */
-    private $allowedTypes = [];
+    private array $allowedTypes = [];
 
     /**
      * A list of info messages for each option.
      */
-    private $info = [];
+    private array $info = [];
 
     /**
      * A list of closures for evaluating lazy options.
      */
-    private $lazy = [];
+    private array $lazy = [];
 
     /**
      * A list of lazy options whose closure is currently being called.
      *
      * This list helps detecting circular dependencies between lazy options.
      */
-    private $calling = [];
+    private array $calling = [];
 
     /**
      * A list of deprecated options.
      */
-    private $deprecated = [];
+    private array $deprecated = [];
 
     /**
      * The list of options provided by the user.
      */
-    private $given = [];
+    private array $given = [];
 
     /**
      * Whether the instance is locked for reading.
@@ -126,19 +126,19 @@ class OptionsResolver implements Options
      * process. If any option is changed after being read, all evaluated
      * lazy options that depend on this option would become invalid.
      */
-    private $locked = false;
+    private bool $locked = false;
 
-    private $parentsOptions = [];
+    private array $parentsOptions = [];
 
     /**
      * Whether the whole options definition is marked as array prototype.
      */
-    private $prototype;
+    private ?bool $prototype = null;
 
     /**
      * The prototype array's index that is being read.
      */
-    private $prototypeIndex;
+    private int|string|null $prototypeIndex = null;
 
     /**
      * Whether to ignore undefined options.