Added script to extract all submissions from Hackerrank using python

[yash-sharma13]

Pull Request Template

hackerrank-submissions-extractor -

A small program to extract all submissions from Hackerrank.
This program will only save the accepted submissions, so please tweak the code to get all submissions.

Issue no.(must) - #897

Self Check(Tick After Making pull Request)

• This issue was assigned to me.
• One Change in one Pull Request
• My file is in proper folder (Name of folder should be in lowercase with no space in between) (E.g. meet_schedular)
• I am following clean code and Documentation and my code is well linted with flake8.
• I have added README.md and requirements.txt (Include version numbers too e.g. pandas==0.0.1) with my script
• I have used REPO README TEAMPLATE (Necessary)
• Just including required dependencies in requirements.txt (Don't include Python version too)