update laravel to 5.4, add tinker package (it can be required as package now). namespace the tests

Author: adibhanna

composer.json

@@ -6,8 +6,9 @@
     "type": "project",
     "require": {
         "php": ">=5.6.4",
-        "laravel/framework": "5.3.*",
-        "lucid-arch/laravel-foundation": "5.3.*"
+        "laravel/framework": "5.4.*",
+        "lucid-arch/laravel-foundation": "5.3.*",
+        "laravel/tinker": "~1.0"
     },
     "require-dev": {
         "fzaninotto/faker": "~1.4",
@@ -23,14 +24,10 @@
         ],
         "psr-4": {
             "Framework\\": "app/",
-            "App\\": "src/"
+            "App\\": "src/",
+            "Tests\\": "tests/"
         }
     },
-    "autoload-dev": {
-        "classmap": [
-            "tests/TestCase.php"
-        ]
-    },
     "scripts": {
         "post-root-package-install": [
             "php -r \"file_exists('.env') || copy('.env.example', '.env');\""
@@ -48,6 +45,9 @@
         ]
     },
     "config": {
-        "preferred-install": "dist"
-    }
+        "preferred-install": "dist",
+        "sort-packages": true
+    },
+    "minimum-stability": "dev",
+    "prefer-stable": true
 }