[NEP-14877] adds support for Rails 6.1

[msxavi]

No description provided.

[NandiniNayak]

LGTM 👍

[mateusdeap]

@msxavi So, after more testing, we were able to get a good fix for the issue I mentioned in the last call, related to the expense form report.

We just need to also change the contract/errors.rb file like so:

# lib/reform_126/contract/errors.rb
 
  def merge!(errors, prefix)
    if Rails.version > "6.1"
      errors.errors.each do |error|
        add(error.attribute, error.type, message: error.message)
      end
    else
      # TODO: merge into AM.
      errors.messages.each do |field, msgs|
        unless field.to_sym == :base
          field = (prefix+[field]).join(".").to_sym # TODO: why is that a symbol in Rails?
        end

        msgs = [msgs] if Reform126.rails3_0? # DISCUSS: fix in #each?

        msgs.each do |msg|
          next if messages[field] and messages[field].include?(msg)
          add(field, msg)
        end # Forms now contains a plain errors hash. the errors for each item are still available in item.errors.
      end
    end
  end

I can add the commit, if you want.