[BCB] Parameter $callableParameters of MutatingScope::enterAnonymou…

…sFunction() and enterArrowFunction() made required

UPGRADING.md

@@ -47,3 +47,7 @@ If you want to change `$overwrite` or `$rootExpr` (previous parameters also used
 ### Changed `TypeSpecifier::specifyTypesInCondition()`
 
 This method now longer accepts `Expr $rootExpr`. If you want to change it, call `setRootExpr()` on [`SpecifiedTypes`](https://apiref.phpstan.org/2.0.x/PHPStan.Analyser.SpecifiedTypes.html) (object returned by `TypeSpecifier::specifyTypesInCondition()`). `setRootExpr()` method returns a new object (SpecifiedTypes is immutable).
+
+### Minor backward compatibility breaks
+
+* Parameter `$callableParameters` of [`MutatingScope::enterAnonymousFunction()`](https://apiref.phpstan.org/2.0.x/PHPStan.Analyser.MutatingScope.html#_enterAnonymousFunction) and [`enterArrowFunction()`](https://apiref.phpstan.org/2.0.x/PHPStan.Analyser.MutatingScope.html#_enterArrowFunction) made required

src/Analyser/MutatingScope.php

@@ -3376,7 +3376,7 @@ public function isInClosureBind(): bool
 	 */
 	public function enterAnonymousFunction(
 		Expr\Closure $closure,
-		?array $callableParameters = null,
+		?array $callableParameters,
 	): self
 	{
 		$anonymousFunctionReflection = $this->getType($closure);
@@ -3411,7 +3411,7 @@ public function enterAnonymousFunction(
 	 */
 	private function enterAnonymousFunctionWithoutReflection(
 		Expr\Closure $closure,
-		?array $callableParameters = null,
+		?array $callableParameters,
 	): self
 	{
 		$expressionTypes = [];
@@ -3553,7 +3553,7 @@ private function invalidateStaticExpressions(array $expressionTypes): array
 	 * @api
 	 * @param ParameterReflection[]|null $callableParameters
 	 */
-	public function enterArrowFunction(Expr\ArrowFunction $arrowFunction, ?array $callableParameters = null): self
+	public function enterArrowFunction(Expr\ArrowFunction $arrowFunction, ?array $callableParameters): self
 	{
 		$anonymousFunctionReflection = $this->getType($arrowFunction);
 		if (!$anonymousFunctionReflection instanceof ClosureType) {