Support return `int` and its boxed type in `@Insert` methods.

[roll-w]

Currently the @Insert only supports long and its boxed type in return value.

Declare methods like:

@Insert
int[] insert(User[] users);

will got an error told you that int[] is not supported.

Therefore, there is a need to support types such as int, int[], Integer, Integer[], List<Integer> and others.