upgrade code from python 2 to python3 and platform independent

[devarajug]

Updates:

• Upgraded script from python version 2 to 3.
• Platform dependency removed. Now script work on Windows, Linux and Mac as well :)
• Script Checks the dependency check tool version on system (if present) and compare it with latest version on the web.
• If old version present in system it downloads the latest version and extracts it.
• If tool is same version as web latest version then skips the step.
• If tool not present in system then latest version downloaded and extracts it.
• Added Poetry as dependency tracker for better management.