.travis.yml in niceql-0.1.2 vs .travis.yml in niceql-0.1.3

@@ -1,5 +1,7 @@
 sudo: false
 language: ruby
 rvm:
-  - 2.4.1
-before_install: gem install bundler -v 1.15.4
+  - 2.4
+  - 2.5
+  - 2.3
+  - 2.6
\ No newline at end of file