Merge pull request #42 from magento-hackathon/travis-php-72

Update .travis.yml

Author: tmotyl

.travis.yml

@@ -1,11 +1,11 @@
 language: php
 
 php:
-  - 7.1
+  - 7.2
 
 before_script:
   - travis_retry composer self-update
   - travis_retry composer install --prefer-source --no-interaction
 
 script:
-  - phpunit
+  - phpunit

composer.json

@@ -18,12 +18,13 @@
         "n98/magerun": ">=1.94.0"
     },
     "require-dev": {
-        "phpunit/phpunit": "^6"
+        "phpunit/phpunit": "^8"
     },
     "autoload": {
         "psr-0": {
             "FIREGENTO": "src/"
         }
     },
-    "minimum-stability": "dev"
+    "minimum-stability": "dev",
+    "prefer-stable": true
 }