.travis.yml in erd-0.6.0 vs .travis.yml in erd-0.6.1

@@ -11,17 +11,16 @@
 cache:
   - apt
   - bundler
 
 before_install:
-  - sudo apt update -qq
   - sudo apt install -y chromium-chromedriver
   - sudo ln -s /usr/lib/chromium-browser/chromedriver /usr/bin/
-  - gem install bundler
+  - gem i bundler -v '<2'
 
 rvm:
-  - 2.5.3
+  - 2.6.0
   - 2.0.0
 
 gemfile:
   - gemfiles/rails_52.gemfile
   - gemfiles/rails_51.gemfile
@@ -37,16 +36,16 @@
       gemfile: gemfiles/rails_52.gemfile
     - rvm: 2.0.0
       gemfile: gemfiles/rails_51.gemfile
     - rvm: 2.0.0
       gemfile: gemfiles/rails_50.gemfile
-    - rvm: 2.5.3
+    - rvm: 2.6.0
       gemfile: gemfiles/rails_42.gemfile
-    - rvm: 2.5.3
+    - rvm: 2.6.0
       gemfile: gemfiles/rails_41.gemfile
-    - rvm: 2.5.3
+    - rvm: 2.6.0
       gemfile: gemfiles/rails_40.gemfile
-    - rvm: 2.5.3
+    - rvm: 2.6.0
       gemfile: gemfiles/rails_32.gemfile
   include:
     - rvm: 1.8.7
       gemfile: gemfiles/rails_32.gemfile