update usps

[happyleavesaoc]

Description:

Bumps usps version:

• fixes various login/parsing issues
• adds informed delivery support

Breaking changes:

• entity naming changed since we now add two entities. Uses the name suffixed with _packages or _mail.
• now uses scan_interval instead of update_interval in config

Pull request in home-assistant.github.io with documentation (if applicable): home-assistant/home-assistant.io#2662

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.

[mention-bot]

@happyleavesaoc, thanks for your PR! By analyzing the history of the files in this pull request, we identified @fabaff, @balloob and @rmkraus to be potential reviewers.