Update .travis.yml

.travis.yml

@@ -12,10 +12,7 @@ cache:
 
 install:
   - phpenv config-rm xdebug.ini || true
-  - composer config --global discard-changes true
-  - composer update
-  - composer require satooshi/php-coveralls dev-master --dev
-  - composer show --installed
+  - composer install
 
 script:
   - find -name "*.php" -not -path "./vendor/*" -print0 | xargs -n 1 -0 php -l
@@ -23,4 +20,6 @@ script:
   - PHP_CS_FIXER_IGNORE_ENV=1 php vendor/bin/php-cs-fixer --diff --dry-run -v fix
 
 after_script:
-  - php vendor/bin/coveralls -v
+  - curl -OL https://github.com/php-coveralls/php-coveralls/releases/download/v1.0.0/coveralls.phar
+  - chmod +x coveralls.phar
+  - ./coveralls.phar -v