.travis.yml in activeforce-1.10.5 vs .travis.yml in activeforce-2.0.0

@@ -1,19 +1,18 @@
 language: ruby
 rvm:
-  - 2.6.3
-  - 2.3.3
+  - 2.3.1
+  - 2.2.3
+  - 2.1.4
+  - 2.0.0
   - ruby-head
 
 sudo: false
 
 matrix:
   allow_failures:
     - rvm: ruby-head
-  exclude:
-    - rvm: 2.3.3
-      gemfile: gemfiles/6.0.gemfile
 
 gemfile:
-  - gemfiles/5.0.gemfile
-  - gemfiles/5.2.gemfile
-  - gemfiles/6.0.gemfile
+  - gemfiles/4.0.gemfile
+  - gemfiles/4.1.gemfile
+  - gemfiles/4.2.gemfile