Add support for Laravel 5.2 projects

Update the minimum required php version to 5.6

.travis.yml

@@ -1,7 +1,6 @@
 language: php
 
 php:
-  - 5.5
   - 5.6
   - 7.0
   - hhvm
@@ -11,11 +10,6 @@ cache:
     - $HOME/.composer/cache
     - vendor
 
-matrix:
-  allow_failures:
-    - php: 7.0
-  fast_finish: true
-
 sudo: false
 
 before_install:

README.md

@@ -16,15 +16,15 @@ Html Minification can be extremely powerfull and can reduce the size of you're w
 ## Installation (Couldn't be easier!)
 Let composer do the hard work for us!
 ```php
-composer require arjanschouten/htmlminifier dev-master
+composer require arjanschouten/htmlminifier
 ```
-#### Laravel 5.1
-With Laravel 5.1 you've to register the service provider in the ```config/app.php``` file and add it to the providers array:
+#### Laravel 5.1 and Laravel 5.2
+With Laravel 5 you've to register the service provider in the ```config/app.php``` file and add it to the providers array:
 ```php
 ArjanSchouten\HtmlMinifier\Laravel\HtmlMinifierServiceProvider::class
 ```
 
-#### Lumen
+#### Lumen 5
 With Lumen you've to register the service provider in the ```bootstrap/app.php``` file and add the following line:
 ```php
 $app->register(ArjanSchouten\HtmlMinifier\Laravel\HtmlMinifierServiceProvider::class);

composer.json

@@ -10,11 +10,11 @@
     }
   ],
   "require": {
-    "php": ">=5.5",
-    "illuminate/contracts": "5.1.*",
-    "illuminate/filesystem": "5.1.*",
-    "illuminate/support": "5.1.*",
-    "illuminate/console": "5.1.*"
+    "php": ">=5.6",
+    "illuminate/contracts": "5.1.*|5.2.*",
+    "illuminate/filesystem": "5.1.*|5.2.*",
+    "illuminate/support": "5.1.*|5.2.*",
+    "illuminate/console": "5.1.*|5.2.*"
   },
   "require-dev": {
     "mockery/mockery": "~0.9",