Merge pull request #463 from thephpleague/travis

Update .travis.yml

.travis.yml

@@ -4,21 +4,24 @@ sudo: false
 
 matrix:
   include:
+    - php: hhvm-3.18
+      dist: trusty
+    - php: hhvm-3.30
+      dist: trusty
     - php: 5.4
+      dist: trusty
     - php: 5.5
+      dist: trusty
     - php: 5.6
+      dist: xenial
     - php: 7.0
+      dist: xenial
     - php: 7.1
+      dist: bionic
     - php: 7.2
+      dist: bionic
     - php: 7.3
-    - php: hhvm-3.18
-      dist: trusty
-    - php: hhvm-3.30
-      dist: trusty
-
-before_install:
-  - if [[ $TRAVIS_PHP_VERSION =~ ^hhvm ]]; then echo 'hhvm.jit = false' >> /etc/hhvm/php.ini ; fi
-  - composer self-update --stable -n
+      dist: bionic
 
 install:
   - travis_retry composer install --no-suggest --prefer-dist -n -o