.travis.yml in closure_tree-7.0.0 vs .travis.yml in closure_tree-7.1.0

@@ -1,16 +1,14 @@
 cache: bundler
 sudo: false
 language: ruby
 rvm:
-  - 2.6.0
-  - 2.5.1
-  - 2.4.4
-  - 2.3.6
-  - 2.2.10
+  - 2.6.3
+  - 2.5.5
 
 gemfile:
+  - gemfiles/activerecord_6.0.gemfile
   - gemfiles/activerecord_5.2.gemfile
   - gemfiles/activerecord_5.1.gemfile
   - gemfiles/activerecord_5.0.gemfile
   - gemfiles/activerecord_4.2.gemfile
   - gemfiles/activerecord_edge.gemfile
@@ -18,13 +16,18 @@
 env:
   - DB=sqlite
   - DB=mysql
   - DB=postgresql
 
+services:
+  - mysql
+  - postgresql
+
 script: WITH_ADVISORY_LOCK_PREFIX=$TRAVIS_JOB_ID bundle exec rake --trace spec:all
 
 matrix:
   allow_failures:
-    - gemfile: gemfiles/activerecord_edge.gemfile
-    - rvm: jruby-head
-    - rvm: rbx
-    - rvm: 2.6.0
+  - gemfile: gemfiles/activerecord_edge.gemfile
+  - gemfile: gemfiles/activerecord_6.0.gemfile
+  exclude:
+  - rvm: 2.5.5
+    gemfile: gemfiles/activerecord_edge.gemfile