fix travis

.travis.yml

@@ -32,6 +32,7 @@ matrix:
 before_script:
   - composer self-update
   - composer install --prefer-dist --no-interaction --dev
+  - composer require yangqi/htmldom:dev-master
 
   - sh -c "if [ '$DB' = 'mysql' ]; then mysql -e 'CREATE DATABASE cakephp_test;'; fi"
   - sh -c "if [ '$DB' = 'pgsql' ]; then psql -c 'CREATE DATABASE cakephp_test;' -U postgres; fi"