Merge pull request #50 from xabbuh/test-deps

test low and high dependency versions

.travis.yml

@@ -7,9 +7,21 @@ php:
   - 5.6
   - hhvm
 
-before_script:
- - wget http://getcomposer.org/composer.phar
- - php composer.phar install --dev --no-interaction
+env:
+  global:
+    - deps=no
+
+matrix:
+  include:
+    - php: 5.3
+      env: deps=low
+    - php: 5.6
+      env: deps=high
+
+install:
+  - if [ "$deps" = "no" ]; then composer install; fi
+  - if [ "$deps" = "low" ]; then composer update --prefer-lowest; fi
+  - if [ "$deps" = "high" ]; then composer update; fi
 
 script:
  - mkdir -p build/logs