.travis.yml in backticks-1.0.3 vs .travis.yml in backticks-1.0.4

@@ -1,10 +1,32 @@
 sudo: false
 language: ruby
 rvm:
-- 2.0
-- 2.1
-- 2.2
-- 2.3
-- 2.4
-before_install: gem install bundler -v '~> 1.10'
+  - 2.0
+  - 2.1
+  - 2.2
+  - 2.3
+  - 2.4
+  - 2.7.1
+  - 3.0.0
+
+jobs:
+  include:
+  - rvm: 2.0
+    before_install: gem install bundler -v 1.17.3
+  - rvm: 2.1
+    before_install: gem install bundler -v 1.17.3
+  - rvm: 2.2
+    before_install: gem install bundler -v 1.17.3
+  - rvm: 2.3
+    before_install: gem install bundler
+  - rvm: 2.4
+    before_install: gem install bundler
+  - rvm: 2.6
+    before_install: gem install bundler
+  - rvm: 2.7
+    before_install: gem install bundler
+  - rvm: 3.0  
+    before_install: gem install bundler
+    dist: focal # Workaround for: https://github.com/rvm/rvm/issues/5133
+  
 script: bundle exec rake spec