Update .travis.yml

Author: patrickbrouwers

.travis.yml

@@ -10,15 +10,11 @@ cache:
 
 before_script:
   - travis_retry composer self-update
-  - travis_retry composer install --prefer-source --no-interaction
-
-after_script:
-  - wget https://scrutinizer-ci.com/ocular.phar
-  - php ocular.phar code-coverage:upload --format=php-clover coverage.clover
+  - travis_retry composer install --prefer-dist --no-interaction
 
 sudo: false
 
-script: phpunit --coverage-clover=coverage.clover
+script: phpunit
 
 matrix:
   fast_finish: true