Merge 905c8b5 into 3ed4c75

.travis.yml

@@ -1,12 +1,22 @@
 language: php
-php:
-  - '5.5'
-  - '5.6'
-  - '7.0'
-  - '7.1'
+
+dist: trusty
+
+sudo: false
+
+matrix:
+    fast_finish: true
+    include:
+        - php: 5.5
+        - php: 5.6
+        - php: 7.0
+        - php: 7.1
+          env: dependencies=lowest
+        - php: 7.2
 
 install:
   - composer install
+  - if [ "$dependencies" = "lowest" ]; then composer update --prefer-lowest --prefer-stable --optimize-autoloader --classmap-authoritative --no-interaction --no-scripts; fi;
 
 script:
   - mkdir -p build/logs