Fix travis CI build

.travis.yml

@@ -1,8 +1,13 @@
 services:
   - mysql
+addons:
+  apt:
+    packages:
+      - ant
 before_script:
   - echo "USE mysql;\nUPDATE user SET authentication_string=PASSWORD('dev') WHERE user='root';\nFLUSH PRIVILEGES;\n" | mysql -u root
 install:
+  - apt-get install ant
   #- rm $TRAVIS_BUILD_DIR/tools/phpunit
   #- composer require --dev phpunit/phpunit ~6.5.5
   #- $TRAVIS_BUILD_DIR/vendor/bin/phpunit --version