Use composition over inheritance for Lotus::Action::Params

Before:

  irb(main):001:0> Lotus::Action::Params.new({}).methods.size
  => 151

After:

  irb(main):001:0> Lotus::Action::Params.new({}).methods.size
  => 58
  irb(main):002:0> Object.new.methods.size
  => 56