Use a stable version of php-http/discovery (#114)

Use a stable version of php-http/discovery & dropping php 5.4

.travis.yml

@@ -2,7 +2,6 @@ language: php
 sudo: false
 
 php:
-  - 5.4
   - 5.5
   - 5.6
   - 7.0

Readme.md

@@ -32,10 +32,10 @@ composer require happyr/linkedin-api-client
 ```
 
 This library does not have a dependency on Guzzle or any other library that sends HTTP requests. We use the awesome 
-Httplug to achieve the decoupling. We want you to choose what library to use for sending HTTP requests. Consult this list 
+HTTPlug to achieve the decoupling. We want you to choose what library to use for sending HTTP requests. Consult this list 
 ofthis list virtual packages that support [php-http/client-implementation](https://packagist.org/providers/php-http/client-implementation) 
 find clients to use. For more information about virtual packages please refer to 
-[Httplug](http://docs.php-http.org/en/latest/httplug/users.html). Example:
+[HTTPlug](http://docs.php-http.org/en/latest/httplug/users.html). Example:
 
 ```bash
 composer require php-http/guzzle6-adapter
@@ -56,8 +56,6 @@ $linkedIn->setHttpMessageFactory(new Http\Message\MessageFactory\GuzzleMessageFa
 
 ```
 
-If you do not provide anything we will fallback on using auto discovery with [Puli](http://docs.puli.io/en/latest/). It will automatically find the 
-client you have installed.
 
 ## Usage
 

composer.json

@@ -12,15 +12,15 @@
         }
     ],
     "require": {
-        "php": "^5.4|^7.0",
+        "php": "^5.5 || ^7.0",
         "php-http/client-implementation": "^1.0",
         "php-http/httplug": "^1.0",
         "php-http/message": "^1.0",
         "php-http/message-factory": "^1.0",
-        "php-http/discovery": "^0.9"
+        "php-http/discovery": "^1.0"
     },
     "require-dev": {
-        "php-http/guzzle5-adapter": "^0.6",
+        "php-http/guzzle5-adapter": "^1.0",
         "guzzlehttp/psr7": "^1.2",
         "mockery/mockery": "^0.9",
         "illuminate/support": "^5.0"