.travis.yml in graphql-batch-0.3.10 vs .travis.yml in graphql-batch-0.4.0

- old
+ new

@@ -1,7 +1,7 @@
 language: ruby
 rvm:
-  - 2.1
-  - 2.2
   - 2.3
-  - 2.4
-before_install: gem install bundler -v 1.13.3
+  - 2.6
+env:
+  - TESTING_INTERPRETER=true
+  - TESTING_INTERPRETER=false