Added Sniff to php7.1

Author: giucu91

.travis.yml

@@ -8,8 +8,8 @@ matrix:
   - php: '5.5'
   - php: '5.6'
   - php: '7.0'
-    env: SNIFF=1
   - php: '7.1'
+    env: SNIFF=1
     env: DEPLOY=1
 before_script:
 - export PHPCS_DIR=/tmp/phpcs