owtf required old requirements in python 3.8.5

[Rohan-Salwan]

Current Behavior

ERROR: owtf 2.6.0 has requirement psycopg2-binary==2.8, but you'll have psycopg2-binary 2.8.6 which is incompatible.
ERROR: owtf 2.6.0 has requirement SQLAlchemy==1.3.0, but you'll have sqlalchemy 1.4.3 which is incompatible.
ERROR: owtf 2.6.0 has requirement future==0.16.0, but you'll have future 0.18.2 which is incompatible.
ERROR: owtf 2.6.0 has requirement cffi==1.14.1, but you'll have cffi 1.14.5 which is incompatible.

Possible Solution

Update package versions

Context

• Installation method used:direct download clone repo https://github.com/owtf/owtf.git
• Operating System and version (like Kali, Debian, ArchLinux, etc): ubuntu 20.04
• pip/setuptools version:21.0.1
• sudo access:yes