.travis.yml in graphql-guard-1.2.2 vs .travis.yml in graphql-guard-1.3.0

@@ -1,8 +1,8 @@
 sudo: false
 language: ruby
-before_install: gem install bundler -v 1.15.2
+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
@@ -15,15 +15,15 @@
     - gemfile: graphql-1.8.gemfile
       env: GRAPHQL_RUBY_VERSION=1_8 CI=true
       rvm: 2.4.5
     - gemfile: graphql-1.7.gemfile
       env: GRAPHQL_RUBY_VERSION=1_7 CI=true
-      rvm: 2.5.3
+      rvm: 2.5.7
     - gemfile: graphql-1.8.gemfile
       env: GRAPHQL_RUBY_VERSION=1_8 CI=true
-      rvm: 2.5.3
+      rvm: 2.5.7
     - gemfile: graphql-1.7.gemfile
       env: GRAPHQL_RUBY_VERSION=1_7 CI=true
-      rvm: 2.6.1
+      rvm: 2.6.5
     - gemfile: graphql-1.8.gemfile
       env: GRAPHQL_RUBY_VERSION=1_8 CI=true
-      rvm: 2.6.1
+      rvm: 2.6.5