Replaced `requirements` with `requirements.txt`
Replaced `==` with `<=` in requirements
Added `install_requires` in `setup()`
Added `OwnerGenericAPIViews` for `CreateUpdateModel` in `generics.py`
Moved `IsOwnerFilterBackend` from `serializers.py` to `filters.py`
Added `CreateUpdateModel` based `mixins` in `mixins.py`
Replaced `GenericAPIView` with `APIView` again!
Changed `author` from `Himanshu Shankar` to `Civil Machines Technologies Private Limited`
Changed `email` from `mehimanshus.com` to `pypidevcivilmachines.com`