Bump ruby versions in travis to all-latest

mpalmer · mpalmer · commit d2538f7d3833 · 2018-10-04T10:33:22.000+10:00
diff --git a/.travis.yml b/.travis.yml
@@ -3,10 +3,10 @@ sudo: false
 cache: bundler
 
 rvm:
-  - 2.5.0
-  - 2.4.3
-  - 2.3.6
-  - 2.2.9
+  - 2.5.1
+  - 2.4.4
+  - 2.3.7
+  - 2.2.10
 
 gemfile:
   - Gemfile
