updated typefaces to 'PT' family
updated typefaces to 'PT' family

PT is pretty great. lots of variations in the family, everything
matches and flows nicely (including mono, which is rare) and it
simplifies a lot of things. i was hoping for more weight variations but
the lack of options is weight may actually pay off by simplifying the
number of choices and strengthening consistency through the app's type.

prathamesh-sonpatki/frontend,prathamesh-sonpatki/frontend,circleci/frontend,circleci/frontend,circleci/frontend,RayRutjes/frontend,RayRutjes/frontend