Adjust Travis config for latest environment

Author: mbabker

.travis.yml

@@ -1,16 +1,19 @@
 language: php
-
 sudo: false
+dist: trusty
 
 env:
   global:
     - RUN_PHPCS="no"
     - COMPOSER_FLAGS="--prefer-stable"
 
 matrix:
+  fast_finish: true
   include:
     - php: 5.3
+      dist: precise
     - php: 5.3
+      dist: precise
       env: COMPOSER_FLAGS="--prefer-stable --prefer-lowest"
     - php: 5.4
     - php: 5.5
@@ -21,8 +24,10 @@ matrix:
       # This empty flag removes the prefer-stable switch to cause dev dependencies to be installed
       env: COMPOSER_FLAGS=""
     - php: 7.1
+    - php: 7.2
     - php: nightly
   allow_failures:
+    - php: 7.2
     - php: nightly
 
 before_script: