.travis.yml in pact_broker-2.20.0 vs .travis.yml in pact_broker-2.21.0

@@ -1,9 +1,8 @@
 language: ruby
 rvm:
   - 2.4.1
   - 2.3.4
-  - 2.2.7
 services:
   - postgresql
   - mysql
 addons:
   postgresql: "9.5"