.travis.yml in niceql-0.1.3 vs .travis.yml in niceql-0.1.4

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