.travis.yml in openssl-signature_algorithm-0.4.0 vs .travis.yml in openssl-signature_algorithm-1.0.0

@@ -1,10 +1,24 @@
 ---
 dist: bionic
 language: ruby
 cache: bundler
 rvm:
-  - 2.7.0
-  - 2.6.5
-  - 2.5.7
-  - 2.4.9
-before_install: gem install bundler -v 2.1.4
+  - ruby-head
+  - 2.7.1
+  - 2.6.6
+  - 2.5.8
+  - 2.4.10
+gemfile:
+  - gemfiles/openssl_head.gemfile
+  - gemfiles/openssl_2_2.gemfile
+  - gemfiles/openssl_2_1.gemfile
+  - gemfiles/openssl_2_0.gemfile
+  - gemfiles/openssl_default.gemfile
+matrix:
+  fast_finish: true
+  allow_failures:
+    - rvm: ruby-head
+    - gemfile: gemfiles/openssl_head.gemfile
+before_install:
+  - gem install bundler -v 2.1.4
+  - rm Gemfile.lock