.travis.yml in ledger_sync-0.1.0 vs .travis.yml in ledger_sync-1.0.0

@@ -1,7 +1,7 @@
 ---
 sudo: false
 language: ruby
 cache: bundler
 rvm:
-  - 2.6.2
+  - 2.5.1
 before_install: gem install bundler -v 2.0.1