.travis.yml in cose-0.4.1 vs .travis.yml in cose-0.5.0

@@ -1,11 +1,17 @@
 sudo: false
 language: ruby
+
 rvm:
   - ruby-head
-  - 2.6.1
-  - 2.5.3
+  - 2.6.2
+  - 2.5.4
   - 2.4.5
+
+gemfile:
+  - gemfiles/openssl_2_0.gemfile
+  - gemfiles/openssl_2_1.gemfile
+
 before_install: gem install bundler -v 2.0.1
 
 matrix:
   fast_finish: true
   allow_failures: