Prepare for 2.2.0

Author: rafaelfranca

Gemfile.lock

@@ -1,7 +1,7 @@
 PATH
   remote: .
   specs:
-    rails-dom-testing (2.1.1)
+    rails-dom-testing (2.2.0)
       activesupport (>= 5.0.0)
       minitest
       nokogiri (>= 1.6)

lib/rails/dom/testing/version.rb

@@ -3,7 +3,7 @@
 module Rails
   module Dom
     module Testing
-      VERSION = "2.1.1"
+      VERSION = "2.2.0"
     end
   end
 end