Upgrading types and introducing new parameters

v1.0.0-init.pp

class mymodule {
  mytype { "title":
    param1 => "FOO"
  }
}

v1.0.0-mytype.rb

Puppet::Type.newtype(:mytype) do

  newparam(:param1) do
  end  
end

v2.0.0-init.pp

class mymodule {
  mytype { "title":
    param1 => "FOO",
    param2 => "BAR"
  }
}

v2.0.0-mytype.rb

Puppet::Type.newtype(:mytype) do

  newparam(:param1) do
  end
  
  newparam(:param2) do
  end
end