Log Message:
py-faker: updated to 0.8.13

0.8.13:
Add no_NO bank provider.
Add ipv4_network_class, ipv4_private, ipv4_public providers.
Add address_class and private arguments to ipv4 provider.
Add currency, currency_name, cryptocurrency, cryptocurrency_code and \ 
cryptocurrency_name to currency provider.
Add automotive provider for de_DE.
Fix edgecases for Finnish ssn provider.
Add job provider for pt_BR.
Add unix_device and unix_partition to file provider.
Add random_lowercase_letter and random_uppercase_letter to the base provider.
Clarify CLI help.