Bump to version 3.4.0

Author: geoffharcourt

README.md

@@ -197,7 +197,7 @@ See guidelines in [`RELEASING.md`](RELEASING.md) for details
 License
 -------
 
-Parity is © 2013-2018 thoughtbot, inc.
+Parity is © 2013-2021 thoughtbot, inc.
 It is free software,
 and may be redistributed under the terms specified in the [LICENSE] file.
 

lib/parity/version.rb

@@ -1,3 +1,3 @@
 module Parity
-  VERSION = "3.3.0".freeze
+  VERSION = "3.4.0".freeze
 end