Allow for submit_form and update_form to take in date type input.

[DuldR]

Trying to submit a form with a type of "date" would raise the following error:

 1) test submit_form/2 submit form handles dates (Pages.Driver.ConnTest)
     test/pages/driver/conn_test.exs:64
     ** (FunctionClauseError) no function clause matching in Pages.Form.update_value/3

     The following arguments were given to Pages.Form.update_value/3:

         # 1
         [{"id", "form_date_value"}, {"name", "form[date_value]"}, {"type", "date"}, {"value", "2021-01-01"}]

         # 2
         "date"

         # 3
         %{"form[date_value]" => "2021-08-15"}

     Attempted function clauses (showing 3 out of 3):

         defp update_value(attrs, type, inputs) when type === "email" or type === "number" or type === "password" or type === "search" or type === "tel" or type === "text" or type === "textarea" or type === "url"
         defp update_value(attrs, "checkbox", inputs)
         defp update_value(attrs, "radio", inputs)

     code: |> Pages.update_form("#form", :form, date_value: "2021-08-15")

This is due to the valid types for update_value not include date. This PR adds in the date type and a corresponding test.

[sax]

Awesome possum. Shipping it.