[13.x] Sync getter return types with their property generics (#60591)

Author: dfinchenko

src/Illuminate/Config/Repository.php

@@ -251,7 +251,7 @@ public function push($key, $value)
     /**
      * Get all of the configuration items for the application.
      *
-     * @return array
+     * @return array<string, mixed>
      */
     public function all()
     {

src/Illuminate/Contracts/Config/Repository.php

@@ -24,7 +24,7 @@ public function get($key, $default = null);
     /**
      * Get all of the configuration items for the application.
      *
-     * @return array
+     * @return array<string, mixed>
      */
     public function all();
 

src/Illuminate/Database/Eloquent/Relations/BelongsToMany.php

@@ -1687,7 +1687,7 @@ public function getPivotAccessor()
     /**
      * Get the pivot columns for this relationship.
      *
-     * @return array
+     * @return array<string|\Illuminate\Contracts\Database\Query\Expression>
      */
     public function getPivotColumns()
     {

src/Illuminate/Events/Dispatcher.php

@@ -894,7 +894,7 @@ protected function shouldDeferEvent(string $event)
     /**
      * Gets the raw, unprepared listeners.
      *
-     * @return array
+     * @return array<string, callable|array|class-string|null>
      */
     public function getRawListeners()
     {

src/Illuminate/Foundation/Http/Kernel.php

@@ -577,7 +577,7 @@ protected function renderException($request, Throwable $e)
     /**
      * Get the application's global middleware.
      *
-     * @return array
+     * @return array<int, class-string|string>
      */
     public function getGlobalMiddleware()
     {