Upgrade versions of requirements in requirements.txt

[rahulkumaran]

Issue Summary

Update the version numbers of the requirements in requirements.txt as currently we have versions above the current mentioned ones that are stable.

Steps to Reproduce

1. Check requirements.txt

It's better to stay up to date with these as it would help us avoid problems later.
I'd like to work on this.

[jamietanna]

@thinkingserious I think this can probably be closed now?

[premkagrani]

Is it still open?If yes i would like to take it up!

[childish-sambino]

Fixed by #630