当我运行命令php artisan:make migration时，出现此错误：
PHP Fatal error: Declaration of NunoMaduro\Collision\Writer::write(Whoops\Exception\Inspector $inspector): NunoMaduro\Collision\void must be compatible with NunoMaduro\Collision\Contracts\Writer::write(Whoops\Exception\Inspector $inspector): NunoMaduro\Collision\Contracts\void in /home/gregory/folbet/vendor/nunomaduro/collision/src/Writer.php on line 27
Symfony\Component\Debug\Exception\FatalErrorException : Declaration of NunoMaduro\Collision\Writer::write(Whoops\Exception\Inspector $inspector): NunoMaduro\Collision\void must be compatible with NunoMaduro\Collision\Contracts\Writer::write(Whoops\Exception\Inspector $inspector): NunoMaduro\Collision\Contracts\void
at /home/gregory/folbet/vendor/nunomaduro/collision/src/Writer.php:27 23| * This is an Collision Writer implementation.
24| * 25| * @author Nuno Maduro <enunomaduro@gmail.com>
26| */ > 27| class Writer implements WriterContract 28| {
29| /** 30| * The number of frames if no verbosity is specified. 31| */
PHP Fatal error: Uncaught TypeError: Return value of NunoMaduro\Collision\Writer::write() must be an instance of NunoMaduro\Collision\void, none returned in /home/gregory/folbet/vendor/nunomaduro/collision/src/Writer.php:114
Stack trace:
#0 /home/gregory/folbet/vendor/nunomaduro/collision/src/Handler.php(48): NunoMaduro\Collision\Writer->write(Object(NunoMaduro\Collision\Adapters\Laravel\Inspector))
#1 /home/gregory/folbet/vendor/nunomaduro/collision/src/Adapters/Laravel/ExceptionHandler.php(86): NunoMaduro\Collision\Handler->handle()
#2 /home/gregory/folbet/vendor/laravel/framework/src/Illuminate/Foundation/Bootstrap/HandleExceptions.php(101): NunoMaduro\Collision\Adapters\Laravel\ExceptionHandler->renderForConsole(Object(Symfony\Component\Console\Output\ConsoleOutput), Object(Symfony\Component\Debug\Exception\FatalErrorException))
#3 /home/gregory/folbet/vendor/laravel/framework/src/Illuminate/Foundation/Bootstrap/HandleExceptions.php(87): Illuminate\Foundation\Bootstrap\HandleExceptions->renderForConsole(Object(Symfony\Com in /home/gregory/folbet/vendor/nunomaduro/collision/src/Writer.php on line 114
我该如何解决？
我的Laravel版本是5.6。*，我的PHP版本是^ 7.1.3