Add Travis config

jdrda · jdrda · commit 736356abd705 · 2016-12-09T09:35:07.000+01:00
diff --git a/travis.yml b/travis.yml
@@ -6,4 +6,6 @@ php:
   - '7.0'
   - '7.1'
   - hhvm
-  - nightly
+  - nightly
+before_script:
+  - composer install --prefer-source --no-interaction --dev
