Add using-constant-test, use-list-literal & useless-object-inheritance check

[Ruchip16]

The use-list-literal check ensures using list literals (i.e., []) instead of the list() function.

The using-constant-test check indicates that if the conditional statement always evaluates to the same value and is therefore unnecessary. In this case, its better to remove the unnecessary conditional statement.

The use-a-generator check suggests to use a generator expression instead of a list comprehension inside the function. Using a generator expression instead of a list comprehension can be more efficient because it does not create a new list in memory. Instead, it generates values on the fly as they are needed, which can save memory and improve the performanceof our code.

The unused-variable check ensures that there is no unsed variable declared in the code.

The useless-object-inheritance check ensures that in Python 3, it is no longer necessary to explicitly inherit from object since all classes inherit from object by default. Therefore, we can safely remove the reference to object from the class definition. This will ensure that the class still inherits from object by default in Python 3.

Related to #85