Uses Thor actions where possible

Author: alindeman

Diff for: Thorfile

@@ -1,12 +1,11 @@
 class Version < Thor
+  include Thor::Actions
+
   desc "use VERSION", "installs the bundle the rails-VERSION"
   def use(version)
-    `rm Gemfile.lock`
-    `echo #{version} > ./.rails-version`
-    "bundle install --binstubs".tap do |m|
-      say m
-      system m
-    end
+    remove_file "Gemfile.lock"
+    run "echo '#{version}' > ./.rails-version"
+    run "bundle install --binstubs"
   end
 
   desc "which", "print out the configured rails version"