Add v2.5.x and v2.6.x to testing matrix

Tom Scott · Tom Scott · commit 855322c6505c · 2019-06-20T15:08:10.000-04:00
diff --git a/.travis.yml b/.travis.yml
@@ -6,6 +6,8 @@ rvm:
 - 2.2
 - 2.3
 - 2.4
+- 2.5
+- 2.6
 - ruby-head
 - jruby-head
 services:
