Upload code coverage to scrutinizer

.scrutinizer.yml

@@ -0,0 +1,6 @@
+imports:
+    - php
+
+tools:
+    external_code_coverage:
+        timeout: 1200    # Timeout in seconds.

.travis.yml

@@ -22,4 +22,8 @@ before_script:
   - composer install
 
 script:
-    - vendor/bin/phpunit
+    - ./vendor/bin/phpunit --coverage-clover=coverage.clover
+
+after_script:
+    - wget https://scrutinizer-ci.com/ocular.phar
+    - php ocular.phar code-coverage:upload --format=php-clover coverage.clover