Run coverage against latest versions

Author: vgarvardt

.travis.yml

@@ -7,10 +7,8 @@ php:
 
 script:
   - composer install -n
-  - vendor/bin/phpunit
-  - rm -rf vendor
-  - composer update --prefer-lowest -n
   - vendor/bin/phpunit --coverage-clover=coverage.xml
-
-after_success:
   - if [ "$TRAVIS_SECURE_ENV_VARS" == "true" ]; then bash <(curl -s https://codecov.io/bash); fi
+  - rm -rf vendor
+  - composer update --prefer-lowest -n
+  - vendor/bin/phpunit