docs: add type hints to docs

commands.md

@@ -31,21 +31,16 @@ class InspiringCommand extends Command
 
     /**
      * Execute the console command.
-     *
-     * @return mixed
      */
-    public function handle()
+    public function handle(): void
     {
         $this->info('Simplicity is the ultimate sophistication.');
     }
 
     /**
      * Define the command's schedule.
-     *
-     * @param  \Illuminate\Console\Scheduling\Schedule $schedule
-     * @return void
      */
-    public function schedule(Schedule $schedule)
+    public function schedule(Schedule $schedule): void
     {
         // $schedule->command(static::class)->everyMinute();
     }
@@ -71,7 +66,7 @@ The `description` property should contain one line description of your command's
 
 The `handle` method is the place where the logic of your command should be. This method will be called when your command is executed. Note that we are able to inject any dependencies we need into the `handle` method:
 ```php
-public function handle(Service $service)
+public function handle(Service $service): void
 {
     $service->execute('foo');
 

service-providers.md

@@ -21,7 +21,7 @@ app(Contract::class) // Returns a Concrete implementation.
 
 This is useful, because you may want to ask for the contract instead of the implementation:
 ```php
-public function handle(ServiceContract $service)
+public function handle(ServiceContract $service): void
 {
     $service->execute('foo');
 }

task-scheduling.md

@@ -16,7 +16,7 @@ need to add the following Cron entry to your server:
 You may define all of your scheduled tasks in the `schedule` method of the Artisan command:
 
 ```php
-public function schedule(Schedule $schedule)
+public function schedule(Schedule $schedule): void
 {
     $schedule->command(static::class)->everyMinute();
 }

web-browser-automation.md

@@ -15,12 +15,7 @@ you can use Laravel Dusk for web tasks that should be automated. Let's take a lo
 ```php
 class VisitLaravelZeroCommand extends Command
 {
-    /**
-     * Execute the console command.
-     *
-     * @return mixed
-     */
-    public function handle()
+    public function handle(): void
     {
         $this->browse(function ($browser) {
             $browser->visit('https://laravel-zero.com')