Move PHP 7.2 into the main testing matrix
diff --git a/.travis.yml b/.travis.yml
index 0449889..8f7838b 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -32,7 +32,6 @@
 
 matrix:
   allow_failures:
-    - php: 7.2
     - php: hhvm
   exclude:
     - php: hhvm