.travis.yml in annotate_gem-0.0.11 vs .travis.yml in annotate_gem-0.0.12

@@ -1,14 +1,18 @@
 language: ruby
-before_install: gem install bundler -v $BUNDLER_VERSION
+before_install:
+  - find /home/travis/.rvm/rubies -wholename '*default/bundler-*.gemspec' -delete
+  - gem install bundler -v $BUNDLER_VERSION
 install: bundle _${BUNDLER_VERSION}_ install --jobs=3 --retry=3
 script: bundle _${BUNDLER_VERSION}_ exec rake test
 matrix:
   include:
+    - rvm: 2.5
+      env: BUNDLER_VERSION=1.16.1
+    - rvm: 2.4
+      env: BUNDLER_VERSION=1.16.1
     - rvm: 2.2
       env: BUNDLER_VERSION=1.12.1
     - rvm: 2.2
-      env: BUNDLER_VERSION=1.5.3
-    - rvm: 1.9
       env: BUNDLER_VERSION=1.12.1
-    - rvm: 1.9
-      env: BUNDLER_VERSION=1.5.3
+    - rvm: 2.0
+      env: BUNDLER_VERSION=1.12.1