New PHP version

Author: webysther

.travis.yml

@@ -1,6 +1,7 @@
 language: php
 
 php:
+  - 7.1
   - 7.0
   - 5.6
   - 5.5
@@ -16,4 +17,4 @@ script:
   # Try to install all requirements.
   - composer install
   # Check if there is a security issue with the required packages.
-  - bin/security-checker security:check
+  - bin/security-checker security:check composer.lock