Add a test layer on lowest dependencies.

This will help identify incompatible changes.
CHStudio · Aug 30, 2017 · 60354e4 · 60354e4
1 parent 65ade58
commit 60354e4
Showing 1 changed file with 4 additions and 1 deletion.
diff --git a/.travis.yml b/.travis.yml
@@ -4,6 +4,9 @@ matrix:
   include:
     - php: 5.6
     - php: 7.0
+    - php: 7.0
+      env:
+        - COMPOSER_FLAGS=--prefer-lowest
     - php: 7.1
       env:
         - ENABLE_XDEBUG=true
@@ -30,7 +33,7 @@ before_script:
     fi
 
 script:
-  - composer install
+  - composer update $COMPOSER_FLAGS
   - if [[ $ENABLE_XDEBUG ]]; then
       php vendor/bin/phpunit --coverage-clover clover.xml;
     else