Update .travis.yml

Author: akankaria

.travis.yml

@@ -16,4 +16,4 @@ script:
 after_script:
     - wget https://scrutinizer-ci.com/ocular.phar
     - php ocular.phar code-coverage:upload --format=php-clover coverage.clover
-    -./test-sample-codes.sh
+    - ./test-sample-codes.sh