adds coverage

.travis.yml

@@ -19,4 +19,8 @@ before_script:
 
 script:
   - composer validate --no-check-lock
-  - vendor/bin/phpunit -v -c phpunit.xml
+    - vendor/bin/phpunit -v -c phpunit.xml.dist --coverage-clover=coverage.clover
+
+after_success:
+  - wget https://scrutinizer-ci.com/ocular.phar
+  - php ocular.phar code-coverage:upload --format=php-clover coverage.clover