lyft sensor: re-enable Prime Time rate attribute

[drkp]

Minor fix -- this was disabled originally because it appeared not to work without using the authenticated user api, but turns out this does work correctly even without a user login
(assuming that sandbox mode is disabled)

Description:

Related issue (if applicable): fixes #

Pull request in home-assistant.github.io with documentation (if applicable): home-assistant/home-assistant.github.io#<home-assistant.github.io PR number goes here>

Example entry for configuration.yaml (if applicable):

Checklist:

If user exposed functionality or configuration variables are added/changed:

• Documentation added/updated in home-assistant.github.io

If the code communicates with devices, web services, or third-party tools:

• Local tests with tox run successfully. Your PR cannot be merged unless tests pass
• New dependencies have been added to the REQUIREMENTS variable (example).
• New dependencies are only imported inside functions that use them (example).
• New dependencies have been added to requirements_all.txt by running script/gen_requirements_all.py.
• New files were added to .coveragerc.

If the code does not interact with devices:

• Local tests with tox run successfully. Your PR cannot be merged unless tests pass
• Tests have been added to verify that the new code works.

[brianjking]

@drkp - Wait, there's a Lyft sensor? Perhaps this is coming in 0.42! Either way, this is great! Thanks..

[drkp]

@brianjking - yes, see #6711 - in fact, the sensor is already in 0.41 although I think the documentation didn't make it in until 0.42

[fabaff]

Looks good to me 🐦