.travis.yml in adyen-1.6.0 vs .travis.yml in adyen-2.0.0.pre1

- old
+ new

@@ -1,6 +1,7 @@
 language: ruby
+cache: bundler
 script: bundle exec rake
 rvm:
 - 1.9.3
 - 2.0.0
 - 2.1.1
@@ -18,5 +19,6 @@
 env:
   global:
   - ADYEN_MERCHANT_ACCOUNT: "VanBergenORG"
   - ADYEN_API_USERNAME: "ws@Company.VanBergen"
   - ADYEN_API_PASSWORD: "7phtHzbfnzsp"
+sudo: false