Add package discovery (#14)

* Bump dev deps

* Add automatic package discovery

README.md

@@ -15,7 +15,10 @@ Via Composer
 $ composer require php-http/laravel-httplug
 ```
 
-Add serviceprovider and alias
+With Laravel 5.5 or newer, the package will be discovered automatically.
+If you're using an older version of Laravel, add the following to your
+`config/app.php`:
+
 ```php
 <?php
 // config.app
@@ -39,11 +42,12 @@ Add serviceprovider and alias
 
 ```
 
-Publish the package config file to config/httplug.php:
+Publish the package config file to `config/httplug.php`:
 
 ```
 php artisan vendor:publish --provider="Http\Httplug\HttplugServiceProvider"
 ```
+
 ## Usage
 
 ```php

composer.json

@@ -26,15 +26,15 @@
         "php-http/discovery": "^1.0"
     },
     "require-dev": {
-        "phpunit/phpunit": "^4.5 || ^5.4",
+        "phpunit/phpunit": "^4.5 || ^5.4 || ^6.0",
         "graham-campbell/testbench": "^3.1",
-        "friendsofphp/php-cs-fixer": "1.9.*",
+        "friendsofphp/php-cs-fixer": "^2.0",
         "sllh/php-cs-fixer-styleci-bridge": "^1.5",
         "php-http/curl-client": "^1.0",
         "php-http/socket-client": "^1.0",
-        "php-http/guzzle6-adapter": "^1.1.1",
-        "php-http/react-adapter": "^0.2.1",
-        "php-http/buzz-adapter": "^0.3"
+        "php-http/guzzle6-adapter": "^1.1",
+        "php-http/react-adapter": "^2.1",
+        "php-http/buzz-adapter": "^1.0"
     },
     "autoload": {
         "psr-4": {
@@ -49,5 +49,15 @@
     "scripts": {
         "test": "vendor/bin/phpunit",
         "test-ci": "vendor/bin/phpunit --coverage-text --coverage-clover=build/coverage.xml"
+    },
+    "extra": {
+        "laravel": {
+            "providers": [
+                "Http\\Httplug\\HttplugServiceProvider"
+            ],
+            "aliases": {
+                "Httplug": "Http\\Httplug\\Facade\\Httplug"
+            }
+        }
     }
 }