Project now building due to dependency on older requests module

[afayle]

When building the project the following error is being raise:
ERROR: requests 2.23.0 has requirement urllib3!=1.25.0,!=1.25.1,<1.26,>=1.21.1, but you'll have urllib3 1.26.5 which is incompatible.

Updating requirements.txt to use requests 2.25.1 seems to work.