.travis.yml in tempus-0.2.0 vs .travis.yml in tempus-1.0.0

@@ -1,5 +1,8 @@
+---
+sudo: false
 language: ruby
+cache: bundler
 rvm:
-  - 1.9.3
-  - 1.9.2
-  - 2.0.0
\ No newline at end of file
+  - 2.5.0
+  - 2.6.3
+before_install: gem install bundler -v 1.17.3