v0.2.0

New "consumer-mode" (#2):

fileoptions = {file: "my.db", uid: "1000", user: "ziggy", gid: "1000", group: "staff", mode: 0o600}
File.open("my.dump", "w") do |file|
  Gdbmish::Dump::Ascii.new(**fileoptions).dump(io) do |appender|
    MyDataSource.each do |key, value|
      appender << {key.to_s, value.to_s}
    end
  end
end