Revert "Adjust travis.yml"

This reverts commit f80bcc0b6f.

.travis.yml

@@ -6,13 +6,14 @@ php:
 
 before_script:
   - composer self-update
-  - composer install --prefer-source --no-interaction
+  - composer update --prefer-source --no-interaction
+
 
 script: 
 - vendor/bin/phpunit --coverage-clover=coverage.xml
 
-after_success:
 # Submit coverage report to https://codecov.io
+after_success:
 - bash <(curl -s https://codecov.io/bash)
 
 # Monitor only these branches
@@ -23,4 +24,4 @@ branches:
 # You can delete the cache using travis-ci web interface
 cache:
   directories:
-- $HOME/.composer/cache
+  - $HOME/.composer/cache