FakerLibrary cannot be initialized with multiple locales

Nobody has claimed this yet.

Faker Library supports initialization with multiple locales:
from faker import Faker
fake = Faker(['it_IT', 'en_US', 'ja_JP'])
for _ in range(10):
print(fake.name())

Whenever I try to initialize library with multiple locales it fails with error:
Error in file '/app/robot/keywords/InventoryImportKeywords.robot': Initializing test library 'FakerLibrary' with arguments [ locale=['ja_JP', 'de_DE', 'en_US'] ] failed: AttributeError: 'list' object has no attribute 'replace'
Traceback (most recent call last):
File "/usr/local/lib/python3.8/site-packages/FakerLibrary/keywords.py", line 42, in __init__
self._fake = faker.factory.Factory.create(locale, providers)
File "/usr/local/lib/python3.8/site-packages/faker/factory.py", line 35, in create
locale = locale.replace('-', '_') if locale else DEFAULT_LOCALE

In factory.py file we always treat locale variable as a string with single argument and line:
locale = locale.replace('-', '_') if locale else DEFAULT_LOCALE
causes this issue

Would be super nice to have initialization with multiple locales implemented

Start in FakerLibrary/keywords.py at the initialization call on line 42 and reproduce the Robot Framework failure with a locale list. Compare that call with faker.factory.Factory.create and factory.py's locale handling. Done means FakerLibrary initializes with multiple locales and the demonstrated name-generation usage works without the AttributeError.

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