.travis.yml in guard-falcon-0.7.0 vs .travis.yml in guard-falcon-0.8.0

@@ -1,10 +1,14 @@
 language: ruby
 sudo: false
 dist: trusty
 cache: bundler
+
+before_script:
+  - gem update --system
+  - gem install bundler
+
 rvm:
-  - 2.2
   - 2.3
   - 2.4
   - 2.5
   - jruby-head
   - ruby-head