Invoke request interface

[koriym]

ResourceObjects that are called to execute resources (calls to onGet methods, etc.), which were done by Invoker, will be passed Invoker to do so. This is the same as the current Transfer mechanism and enhances object autonomy in object-oriented programming.

The benefits gained are

The if statement that used to determine whether an object was an HTTP request object (HttpResourceObject) or a PHP ResourceObject on the Invoker side is eliminated, and resources other than HTTP and PHP method calls can be handled. You can open extensions and close changes for new resources like BEAR.Thrift.

Other extras.

1. You can also write the processing before and after the execution of an object on the ResourceObject side, like AOP.
2. You can also replace it with your own Invoker.

Invokerが行っていたリソースの実行（onGetメソッドなどの呼び出し）を呼ばれたResourceObjectがInvokerを渡してもらって、実行するようにします。現在のTransferの仕組みと同じでオブジェクト指向においてのオブジェクトの自律を強化します。

得られるメリットは

従来Invoker側でHTTPリクエストオブジェクト（HttpResourceObject）なのか、PHPのResourceObjectなのかを判断していたif文を取り除き、HTTPやPHPのメソッドコール以外のリソースも対応できます。BEAR.Thriftのような新しいリソースに対して拡張を開き、変更を閉じることができます。

他におまけで

1. AOPのようにオブジェクトの実行の前後の処理をResourceObject側に記述することもできる。
2. 自身のInvokerに差し替えることもできる

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 100.00%. Comparing base (4249268) to head (9466722).

❗ Current head 9466722 differs from pull request most recent head 04a9614. Consider uploading reports for the commit 04a9614 to get more accurate results

Additional details and impacted files

@@             Coverage Diff             @@
##                 1.x      #291   +/-   ##
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  Coverage     100.00%   100.00%           
- Complexity       498       500    +2     
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  Files             82        83    +1     
  Lines           1327      1333    +6     
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+ Hits            1327      1333    +6     

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