title: upgrade from laravel 7 to laravel 8
body: <p>I am trying to upgrade from laravel 7 to 8 bug i got the error</p>
  <p>Your requirements could not be resolved to an installable set of packages.</p>
  <p>Problem 1</p>
  <pre><code>- Conclusion: don't install laravel/framework v8.0.1 (conflict analysis result)
  - Conclusion: don't install laravel/framework v8.0.2 (conflict analysis result)
  - Conclusion: don't install laravel/framework v8.0.3 (conflict analysis result)
  - Conclusion: don't install laravel/framework v8.33.0 (conflict analysis result)
  - Conclusion: don't install laravel/framework v8.33.1 (conflict analysis result)
  - laravel/horizon[v4.0.0, ..., v4.3.5] require illuminate/support ^7.0 -&gt; satisfiable by illuminate/support[v7.0.0, ..., v7.30.4].
  - Only one of these can be installed: illuminate/support[v5.0.0, ..., v5.8.36, v6.0.0, ..., v6.20.19, v7.0.0, ..., v7.30.4, v8.0.0, ..., v8.33.1], laravel/framework[v8.0.0, ..., v8.33.1]. laravel/framework replaces illuminate/support and thus cannot coexist with it.
  - Root composer.json requires laravel/framework ^8.0 -&gt; satisfiable by laravel/framework[v8.0.0, ..., v8.33.1].
  - Root composer.json requires laravel/horizon ^4.0 -&gt; satisfiable by laravel/horizon[v4.0.0, ..., v4.3.5].
  </code></pre>
  <p>Use the option --with-all-dependencies (-W) to allow upgrades, downgrades and removals for packages currently locked to specific versions.</p>
  <p>my composer</p>
  <pre><code> &quot;require&quot;: {
      &quot;php&quot;: &quot;^7.2&quot;,
      &quot;creativeorange/gravatar&quot;: &quot;~1.0&quot;,
      &quot;doctrine/dbal&quot;: &quot;^2.5&quot;,
      &quot;facade/ignition&quot;: &quot;^2.3.6&quot;,
      &quot;fideloper/proxy&quot;: &quot;~4.0&quot;,
      &quot;fruitcake/laravel-cors&quot;: &quot;^2.0&quot;,
      &quot;guzzlehttp/guzzle&quot;: &quot;^7.0.1&quot;,
      &quot;laravel/framework&quot;: &quot;^8.0&quot;,
      &quot;laravel/helpers&quot;: &quot;^1.1&quot;,
      &quot;laravel/horizon&quot;: &quot;^4.0&quot;,
      &quot;laravel/sanctum&quot;: &quot;^2.3&quot;,
      &quot;laravel/tinker&quot;: &quot;^2.0&quot;,
      &quot;laravel/ui&quot;: &quot;^3.0&quot;,
      &quot;predis/predis&quot;: &quot;^1.1&quot;,
      &quot;spatie/laravel-backup&quot;: &quot;^6.10&quot;,
      &quot;spatie/laravel-permission&quot;: &quot;^3.6&quot;,
      &quot;yajra/laravel-datatables-fractal&quot;: &quot;^1.6&quot;,
      &quot;yajra/laravel-datatables-oracle&quot;: &quot;^9.0&quot;
  },
  &quot;require-dev&quot;: {
      &quot;composer/composer&quot;: &quot;^1.9&quot;,
      &quot;fzaninotto/faker&quot;: &quot;~1.4&quot;,
      &quot;mockery/mockery&quot;: &quot;~1.0&quot;,
      &quot;nunomaduro/collision&quot;: &quot;^5.0&quot;,
      &quot;phpunit/phpunit&quot;: &quot;^9.0&quot;
  },
  </code></pre>
  <p>what is the error , how can i fix it ?</p>