use precise w/ 7.0

cf. https://github.com/travis-ci/travis-ci/issues/8232

.travis.yml

@@ -40,15 +40,19 @@ matrix:
       env: WP_VERSION=latest
     - php: 5.6
       env: WP_VERSION=trunk
-    - php: 7.0.8
+    - php: 7.0
+      dist: precise
       env: WP_VERSION=latest
     - php: 7.1
       env: WP_VERSION=latest
+    - php: 7.2
+      env: WP_VERSION=latest
   allow_failures:
     - php: nightly
     - php: 5.3
     - php: 5.4
     - php: 5.5
+    - php: 7.2
     - env: WP_VERSION=trunk
 
 before_install: