Test against PHP nightly

Author: WyriHaximus

.travis.yml

@@ -9,17 +9,22 @@ cache:
 ## PHP versions we test against
 php:
   - 7.0
+  - nightly
   - hhvm
 
 ## Build matrix for lowest and highest possible targets
 matrix:
   include:
     - php: 7.0
       env: dependencies=lowest
+    - php: nightly
+      env: dependencies=lowest
     - php: hhvm
       env: dependencies=lowest
     - php: 7.0
       env: dependencies=highest
+    - php: nightly
+      env: dependencies=highest
     - php: hhvm
       env: dependencies=highest
   allow_failures: