.travis.yml in process-instrumentation-0.1.2 vs .travis.yml in process-instrumentation-0.1.3

@@ -1,5 +1,6 @@
-sudo: false
 language: ruby
+cache: bundler
+sudo: false
+
 rvm:
-  - 2.3.1
-before_install: gem install bundler -v 1.13.6
+  - 2.6.2