fix testing

Author: splitbrain

.travis.yml

@@ -3,6 +3,7 @@
 language: php
 php:
   - "nightly"
+  - "7.3"
   - "7.2"
   - "7.1"
   - "7.0"
@@ -15,4 +16,4 @@ matrix:
     - php: "nightly"
 before_install: wget https://raw.github.com/splitbrain/dokuwiki-travis/master/travis.sh
 install: sh travis.sh
-script: cd _test && phpunit --stderr --group plugin_tplinc
+script: cd _test && ./phpunit.phar --stderr --group plugin_tplinc