.travis.yml in dns-sd-0.1.2 vs .travis.yml in dns-sd-0.1.3

@@ -1,10 +1,11 @@
 language: ruby
 sudo: false
 cache: bundler
 
 rvm:
-  - 2.4.1
-  - 2.3.4
+  - 2.4.4
+  - 2.3.7
+  - 1.9.3
 
 gemfile:
   - Gemfile