Inhibit method redefined warning if user redefined input method in service object.

[Billy.Zheng]

Following is a example:

class InhibitMethodRedefinedWarning < Actor
  input :page, default: 1, type: [Integer, String]

  def call
    result.page = page
  end

  private

  def page
    result.page.to_i
  end
end

when i run test, get many warn message like this:

/home/zw963/Stocks/marketbet_crawler/app/services/retrieve_insider_history.rb:97: warning: method redefined; discarding old days
/home/zw963/others/.rvm/gems/ruby-3.0.2@marketbet_crawler/gems/service_actor-3.1.2/lib/service_actor/attributable.rb:26: warning: previous definition of days was here

If this gem expect user override input same name method this way, it should do some hack for avoid produce those warning.
the offical recommand way for this is to add a alias. as following code, (i copy from sequel gem).

you can check discuss here.

https://groups.google.com/g/sequel-talk/c/fwa1Pwye_CY/m/DANKiBGOBQAJ

And this hack should fix many warnings when run rspec --warning for gem spec.

[Sunny Ripert]

Closed by #52, thank you @zw963 \o/