Update supported PHP versions and configuration names.

Author: Jan Schneider

.travis.yml

@@ -1,15 +1,13 @@
-sudo: false
 language: php
 php:
-  - 5.4
-  - 5.5
   - 5.6
   - 7.0
   - 7.1
   - 7.2
   - 7.3
+  - 7.4
   - nightly
-matrix:
+jobs:
   fast_finish: true
   allow_failures:
     - php: nightly