Update faker in requirements-dev.txt from 0.8.7 to 0.9.1

[ghost]

Dependencies.io has updated faker (a pypi dependency in requirements-dev.txt) from "0.8.7" to "0.9.1".

0.9.1

• 1 bug fix:
  • Stopped setting I18n default locale
• 1 major enhancement:
  • Added method_missing to Address to add methods based on data in locale files
• 1 minor enhancement:
  • Added Swiss locale [Lukas Westermann]