Resource name inference worked like below:

|Class name|Resource name|
| --- | --- |
| FooResource | Foo |
| FooSerializer | FooSerializer |
| FooElse | FooElse |

However we noticed that lots of users use the term `Serializer` and the current behavior is not convenient.
It now works like below:

|Class name|Resource name|
| --- | --- |
| FooResource | Foo |
| FooSerializer | Foo |
| FooElse | FooElse |

It now deletes `Serializer` suffix as well.

This simplifies `_key` and `_collection_key`.

Now that Alba supports "Serializer" suffix it should be mentioned.