chore: update .travis.yml

bethesque · bethesque · commit 01d0b6c0a57f · 2020-07-07T10:19:06.000+10:00
diff --git a/.travis.yml b/.travis.yml
@@ -1,7 +1,8 @@
 language: ruby
 rvm:
+  # Only supporting 2.4 until we upgrade the DiUS pact broker base image
   - 2.4.1
-  - 2.6
+  - 2.5
 services:
   - postgresql
   - mysql
