.travis.yml in audited-4.6.0 vs .travis.yml in audited-4.7.0

@@ -1,19 +1,24 @@
 language: ruby
 cache: bundler
 rvm:
   - 2.1
-  - 2.2.8
-  - 2.3.5
-  - 2.4.2
+  - 2.2.9
+  - 2.3.6
+  - 2.4.3
+  - 2.5.0
   - ruby-head
 env:
   - DB=SQLITE
   - DB=POSTGRES
   - DB=MYSQL
 addons:
   postgresql: "9.4"
+before_install:
+  # https://github.com/travis-ci/travis-ci/issues/8978
+  - "travis_retry gem update --system"
+  - "travis_retry gem install bundler"
 gemfile:
   - gemfiles/rails40.gemfile
   - gemfiles/rails41.gemfile
   - gemfiles/rails42.gemfile
   - gemfiles/rails50.gemfile
@@ -27,12 +32,16 @@
       gemfile: gemfiles/rails50.gemfile
     - rvm: 2.1
       gemfile: gemfiles/rails51.gemfile
     - rvm: 2.1
       gemfile: gemfiles/rails52.gemfile
-    - rvm: 2.4.2
+    - rvm: 2.4.3
       gemfile: gemfiles/rails40.gemfile
-    - rvm: 2.4.2
+    - rvm: 2.4.3
+      gemfile: gemfiles/rails41.gemfile
+    - rvm: 2.5.0
+      gemfile: gemfiles/rails40.gemfile
+    - rvm: 2.5.0
       gemfile: gemfiles/rails41.gemfile
     - rvm: ruby-head
       gemfile: gemfiles/rails40.gemfile
     - rvm: ruby-head
       gemfile: gemfiles/rails41.gemfile