.travis.yml in zabbixapi-2.4.9 vs .travis.yml in zabbixapi-3.0.0

- old
+ new

@@ -15,10 +15,14 @@
 rvm:
   - 1.9.3
   - 2.0
   - 2.1
   - 2.2
+  - 2.3
+gemfile:
+  - Gemfile
+  - json-1.x.Gemfile
 dist: trusty
 sudo: required
 
 before_script:
   - sudo sed -i "s,;date.timezone =,date.timezone = 'US/Eastern'," /etc/php5/apache2/php.ini
@@ -27,5 +31,11 @@
   - psql -c 'grant all privileges on database zabbix to zabbix;' -U postgres
   - zcat /usr/share/doc/zabbix-server-pgsql/create.sql.gz | LC_ALL=C psql -U zabbix
   - echo "$(curl -fsSL https://gist.githubusercontent.com/evtuhovich/9544441/raw/d661863063b76cc8e2599bc44d8595b1f86ece38/zabbix)" | sudo tee /etc/zabbix/web/zabbix.conf.php
   - sudo service apache2 restart
 script: "ZABBIX_HOST_URL=http://localhost/zabbix/api_jsonrpc.php bundle exec rspec spec/*"
+
+matrix:
+  exclude:
+    # json 2.x requires ruby 2.x
+    - rvm: 1.9.3
+      gemfile: json-1.x.Gemfile