.travis.yml in graphql-guard-1.3.1 vs .travis.yml in graphql-guard-2.0.0

- old
+ new
@@ -1,29 +1,11 @@
 sudo: false
 language: ruby
-before_install: gem install bundler -v 1.17.3
-matrix:
-  include:
-    - gemfile: graphql-1.7.gemfile
-      env: GRAPHQL_RUBY_VERSION=1_7 CI=true
-      rvm: 2.3.8
-    - gemfile: graphql-latest.gemfile
-      env: GRAPHQL_RUBY_VERSION=LATEST CI=true
-      rvm: 2.3.8
-    - gemfile: graphql-1.7.gemfile
-      env: GRAPHQL_RUBY_VERSION=1_7 CI=true
-      rvm: 2.4.5
-    - gemfile: graphql-latest.gemfile
-      env: GRAPHQL_RUBY_VERSION=LATEST CI=true
-      rvm: 2.4.5
-    - gemfile: graphql-1.7.gemfile
-      env: GRAPHQL_RUBY_VERSION=1_7 CI=true
-      rvm: 2.5.7
-    - gemfile: graphql-latest.gemfile
-      env: GRAPHQL_RUBY_VERSION=LATEST CI=true
-      rvm: 2.5.7
-    - gemfile: graphql-1.7.gemfile
-      env: GRAPHQL_RUBY_VERSION=1_7 CI=true
-      rvm: 2.6.5
-    - gemfile: graphql-latest.gemfile
-      env: GRAPHQL_RUBY_VERSION=LATEST CI=true
-      rvm: 2.6.5
+before_install: gem install bundler -v 2.1.4
+rvm:
+  - 2.3.8
+  - 2.4.9
+  - 2.5.7
+  - 2.6.5
+  - 2.7.0
+env:
+  - CI=true