Booleans are nullified about purify HOT 3 CLOSED

<?php

namespace App\Http\Middleware;

use Closure;
use Illuminate\Http\Request;
use Stevebauman\Purify\Facades\Purify;

class XssSanitization
{
    /**
     * Handle an incoming request.
     *
     * @param  \Illuminate\Http\Request  $request
     * @param  \Closure(\Illuminate\Http\Request): (\Illuminate\Http\Response|\Illuminate\Http\RedirectResponse)  $next
     * @return \Illuminate\Http\Response|\Illuminate\Http\RedirectResponse
     */
    public function handle(Request $request, Closure $next)
    {
        $input = $request->all();
        array_walk_recursive($input, function(&$input) {
            $input  = Purify::clean($input);
        });
        $request->merge($input);
        return $next($request);
    }
}

public function test_post_submit()
    {
        $response = $this->actingAs($user)
            ->post('/controller/registration/save/first', [
                'offroad' => '0',
            ]);
       $this->assertEquals(422, $response->getStatusCode());
    }