Attempt PHP 7.2 tests on Travis
diff --git a/.travis.yml b/.travis.yml
index a7e5cda..c235b38 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -8,6 +8,7 @@
   - 5.6
   - 7.0
   - 7.1
+  - 7.2
   - hhvm
   
 env:
@@ -31,6 +32,7 @@
 
 matrix:
   allow_failures:
+    - php: 7.2
     - php: hhvm
   exclude:
     - php: hhvm