Add php 7.1 support

Author: maximebeaudoin

.travis.yml

@@ -8,7 +8,8 @@ matrix:
     - php: 5.5
     - php: 5.6
       env: COLLECT_COVERAGE=true
-    - php: 7
+    - php: 7.0
+    - php: 7.1
     - php: hhvm
 
 install:

README.md

@@ -27,6 +27,7 @@ The following versions of PHP are supported by this version.
 * PHP 5.5
 * PHP 5.6
 * PHP 7.0
+* PHP 7.1
 * HHVM
 
 #### Install in Laravel 4