title: Your requirements could not be resolved to an installable set of packages in laravel 5.7
body: <pre><code>Unable to install package from laravel 5.7
  
  Using version ^0.8.4 for barryvdh/laravel-dompdf ./composer.json has been updated  
  Loading composer repositories with package information  Updating dependencies (including require-dev)
  
   Your requirements could not be resolved to an installable set of packages.
   Problem 1
    - Installation request for laravel/passport == 7.2.1.0 
      -&gt; satisfiable &gt; by laravel/passport[v7.2.1].
    - avored/ecommerce 2.0 requires laravel/passport 5.0.* 
      -&gt; satisfiable by laravel/passport[5.0.x-dev].
    - avored/ecommerce 2.0.1 requires laravel/passport 5.0.* 
      -&gt;  satisfiable by laravel/passport[5.0.x-dev].
    - Conclusion: don't install laravel/passport 5.0.x-dev
    - Installation request for avored/ecommerce 2.* 
      -&gt; satisfiable by &gt; avored/ecommerce[2.0, 2.0.1].
  
    Installation failed, reverting ./composer.json to its original content.
  </code></pre>
  
  <p>My <strong>composer.json</strong> file:</p>
  
  <pre><code> {
          "name": "laravel/laravel",
          "description": "The Laravel Framework.",
          "keywords": ["framework", "laravel"],
          "license": "MIT",
          "type": "project",
          "require": {
              "php": "^7.1.3", 
              "avored/ecommerce": "2.*",
              "avored/module-installer": "1.*",
              "fideloper/proxy": "^4.0",
              "laravel/framework": "5.7.*",
              "laravel/passport": "^7.2",
              "laravel/tinker": "^1.0",
              "laravelcollective/html": "^5.7",
              "unisharp/laravel-filemanager": "^1.8"
  
          },
          "require-dev": {
              "beyondcode/laravel-dump-server": "^1.0",
              "filp/whoops": "^2.0",
              "fzaninotto/faker": "^1.4",
              "mockery/mockery": "^1.0",
              "nunomaduro/collision": "^2.0",
              "phpunit/phpunit": "^7.0",
          "laravel/dusk": "^4.0" 
          },
          "autoload": {
              "classmap": [
                  "database/seeds",
                  "database/factories"
              ],
              "psr-4": {
                  "App\\": "app/"
              }
          },
          "autoload-dev": {
              "psr-4": {
                  "Tests\\": "tests/"
              }
          },
          "extra": {
              "laravel": {
                  "dont-discover": [
                  ]
              }
          },
          "scripts": {
              "post-root-package-install": [
                  "@php -r \"file_exists('.env') || copy('.env.example', '.env');\""
              ],
              "post-create-project-cmd": [
                  "@php artisan key:generate"
              ],
              "post-autoload-dump": [
                  "Illuminate\\Foundation\\ComposerScripts::postAutoloadDump",
                  "@php artisan package:discover"
              ]
          },
          "config": {
              "preferred-install": "dist",
              "sort-packages": true,
              "optimize-autoloader": true
          },
          "minimum-stability": "dev",
          "prefer-stable": true
      }
  </code></pre>