Update .travis.yml

Author: bhoogter

.travis.yml

@@ -6,7 +6,7 @@ branches:
 
 php:
   - '7.2'
-script: phpunit --bootstrap src/autoload.php --test-suffix '-test.php,Test.php,.phpt'
+script: phpunit --bootstrap src/stub.php --test-suffix '-test.php,Test.php,.phpt'
   tests
 notifications:
   email: false