fix travis?

Author: Minishlink

.travis.yml

@@ -6,8 +6,17 @@ php:
   - 5.6
   - hhvm
 
+env:
+  - PAYLOAD=true
+  - PAYLOAD=false
+
+matrix:
+  exclude:
+    - php: 5.4
+      env: PAYLOAD=true
+
 before_script:
   - composer install --prefer-source -n --no-dev
-  - composer require spomky-labs/jose:2.0.x-dev
+  - PAYLOAD && composer require spomky-labs/jose:2.0.x-dev
 
 script: phpunit -c phpunit.travis.xml