implement `__reversed__()` in Array

[HarsheetKakar]

Description of the problem

currently reversed() returns a python list if OneDimensionalArray object is given, it should return ODA object.

Example of the problem

References/Other comments

[czgdp1807]

Minor changes are needed, you can do it.

[HarsheetKakar]

lets resolve #206 and I will bundle all the changes in one PR

[czgdp1807]

#206 is a very different issue. Please make separate PR for this one.

[HarsheetKakar]

small correction in the title above, it returns a reversed generator object.

[HarsheetKakar]

I think i got confused with sorted and reversed, I am applying the changes in DODA, and not in ODA because it will work as it does with or without method overriding. Sorry for confusion