.travis.yml in departure-6.1.0 vs .travis.yml in departure-6.2.0

@@ -1,9 +1,25 @@
 language: ruby
+
 rvm:
-  - 2.2.8
+  - 2.5.5
+  - 2.6.3
+  - 2.7.0
+
+env:
+  - RAILS_VERSION="~> 6.0.0"
+  - RAILS_VERSION="~> 5.2.0"
+
+jobs:
+  include:
+    - rvm: 2.4.6
+      env: RAILS_VERSION="~> 5.2.0"
+
+services:
+  - mysql
+
 before_install:
-  - sudo apt-key adv --keyserver keys.gnupg.net --recv-keys 8507EFA5
+  - travis_retry sudo apt-key adv --keyserver keys.gnupg.net --recv-keys 8507EFA5
   - echo "deb http://repo.percona.com/apt `lsb_release -cs` main" | sudo tee -a /etc/apt/sources.list
   - sudo apt-get update -qq
   - sudo apt-get install percona-toolkit
   - gem update bundler