Migrate CI as a Service from Travis to GitHub Actions

Gemfile

@@ -1,5 +1,6 @@
 source 'https://rubygems.org'
 
 group :development, :test do
+  gem 'rake'
   gem 'vim-flavor', '~> 3.0'
 end

Gemfile.lock

@@ -6,6 +6,7 @@ GEM
     pastel (0.7.2)
       equatable (~> 0.5.0)
       tty-color (~> 0.4.0)
+    rake (13.0.1)
     thor (0.20.0)
     tty-color (0.4.2)
     vim-flavor (3.0.0)
@@ -17,6 +18,7 @@ PLATFORMS
   ruby
 
 DEPENDENCIES
+  rake
   vim-flavor (~> 3.0)
 
 BUNDLED WITH