Revert "travis: stages"

This reverts commit 5f6b660e0baee3f1d9cc644e9f4b2b97e8129e03.

.travis.yml

@@ -1,34 +1,23 @@
 language: php
 
 php:
-  - 7.2
   - 7.1
 
-before_install:
-  # hide xdebug to speed up
-  - mv ~/.phpenv/versions/$(phpenv version-name)/etc/conf.d/xdebug.ini{,.disabled} || echo "xdebug not available"
-
 install:
-  - composer install --prefer-dist
+  - composer install
 
 script:
-  - vendor/bin/phpunit -v
+  - vendor/bin/phpunit --coverage-clover coverage.xml
+  # disable xdebug
+  - phpenv config-rm xdebug.ini || return 0
+  # check coding standard (defined in composer.json "scripts" section)
+  # if this fails, run "composer fix-cs" to fix all fixable issues
+  - composer check-cs
 
-jobs:
-  include:
-    - stage: coding standards and code coverage
-      php: 7.1
-      script:
-        - composer check-cs
-    -
-      php: 7.1
-      script:
-        # get xdebug back for coverage
-        - mv ~/.phpenv/versions/$(phpenv version-name)/etc/conf.d/xdebug.ini{.disabled,}
-        - vendor/bin/phpunit --coverage-clover coverage.xml
-      after_script:
-        - wget https://github.com/satooshi/php-coveralls/releases/download/v1.0.1/coveralls.phar
-        - php coveralls.phar --verbose --config tests/.coveralls.yml
+after_script:
+  # upload coverage to Coveralls.io
+  - wget https://github.com/satooshi/php-coveralls/releases/download/v1.0.1/coveralls.phar
+  - php coveralls.phar --verbose
 
 notifications:
   email: never