Updated travis

Author: vuongxuongminh

.travis.yml

@@ -1,19 +1,19 @@
 language: php
 
 php:
-  - 7.1
+    - 7.1
 
-env:
-  matrix:
-    - COMPOSER_FLAGS="--prefer-lowest"
-    - COMPOSER_FLAGS=""
+install:
+    - composer self-update
+    - composer install
 
 before_script:
-  - travis_retry composer self-update
-  - travis_retry composer update ${COMPOSER_FLAGS} --no-interaction --prefer-source
+    - travis_retry composer self-update
+    - travis_retry composer install --no-interaction --prefer-source --dev
 
 script:
-  - vendor/bin/phpunit --coverage-text --coverage-clover=coverage.clover
+    - phpunit --coverage-text --coverage-clover=coverage.clover
 
 after_script:
-  - php vendor/bin/ocular code-coverage:upload --format=php-clover coverage.clover
+    - wget https://scrutinizer-ci.com/ocular.phar
+    - php ocular.phar code-coverage:upload --format=php-clover coverage.clover