Upgrades testing library requirement
Upgrades testing library requirement

Referenced in the issue here:
https://github.com/FactoryBoy/factory_boy/issues/334

Version 2.8.1 of the factory-boy library references the new Faker
library name.

jazzband/silk,jazzband/silk,crunchr/silk,mtford90/silk,django-silk/silk,mtford90/silk,jazzband/silk,jazzband/silk,django-silk/silk,mtford90/silk,crunchr/silk,django-silk/silk,crunchr/silk,mtford90/silk,django-silk/silk,crunchr/silk