Made the send_keys helper work in selenium as well as cuprite

A few of the test helpers use the `type` helper method but in selenium it raises this error:

     NoMethodError:
       undefined method `keyboard' for #<Selenium::WebDriver::Chrome::Driver:0x000000013ebbb950>

I've changed this to do the same thing (type in the focused element) but in a way that should work in every capybara driver.

lib/avo/test_helpers.rb

@@ -313,7 +313,7 @@ def tag_suggestions(field:, input:)
     end
 
     def type(...)
-      page.driver.browser.keyboard.type(...)
+      page.send_keys(...)
     end
 
     def accept_custom_alert(&block)