Update the app to Laravel 5.5

Squashed commit of the following:

commit 070f46bbacd91855730d467cc2806183441791ae
Author: Jonny Barnes <jonny@jonnybarnes.uk>
Date:   Mon Sep 4 18:06:04 2017 +0100

    Now we now how the laravel IoC conatiner works, no need to be newing class dependencies

commit 57eeacdef178532a681f774f8c6738950d40c964
Author: Jonny Barnes <jonny@jonnybarnes.uk>
Date:   Mon Sep 4 17:59:28 2017 +0100

    Get json test working again

commit 81c3cfc9b432241d8a4df7f1e0511a50ea4f9b90
Author: Jonny Barnes <jonny@jonnybarnes.uk>
Date:   Mon Sep 4 14:38:10 2017 +0100

    Can’t use RefreshDatabase yet

commit 4ba5ff724d50ca86b3fa90c7bb4e71ad9e4dad79
Author: Jonny Barnes <jonny@jonnybarnes.uk>
Date:   Mon Sep 4 14:10:33 2017 +0100

    Initial attempt at updating to Laravel 5.5

config/app.php

@@ -10,6 +10,7 @@ return [
     | This value is the name of your application. This value is used when the
     | framework needs to place the application's name in a notification or
     | any other location as required by the application or its packages.
+    |
     */
 
     'name' => 'jonnybarnes.uk',

config/session.php

@@ -122,7 +122,10 @@ return [
     |
     */
 
-    'cookie' => 'laravel_session',
+    'cookie' => env(
+        'SESSION_COOKIE',
+        str_slug(env('APP_NAME', 'laravel'), '_').'_session'
+    ),
 
     /*
     |--------------------------------------------------------------------------
@@ -176,4 +179,19 @@ return [
 
     'http_only' => true,
 
+    /*
+    |--------------------------------------------------------------------------
+    | Same-Site Cookies
+    |--------------------------------------------------------------------------
+    |
+    | This option determines how your cookies behave when cross-site requests
+    | take place, and can be used to mitigate CSRF attacks. By default, we
+    | do not enable this as other CSRF protection services are in place.
+    |
+    | Supported: "lax", "strict"
+    |
+    */
+
+    'same_site' => null,
+
 ];