selenium_webdriver_3.gemfile in capybara-shadowdom-0.3.0

- old
+ new

@@ -7,7 +7,8 @@
 gem "webdrivers"
 gem "pry-byebug"
 gem "webrick"
 gem "rexml"
 gem "selenium-webdriver", "~> 3"
+gem "rack", "~> 2.2.3"
 
 gemspec path: "../"