Type annotations: fix typing issues

[penguinolog]

• Combining deprecated typing with annotations enabled
• Using Collection and expecting __getitem__

Checklist

• I've ensured that similar functionality has not already been implemented
• I've ensured that similar functionality has not earlier been proposed and declined
• I've branched off the master branch
• I've merged fresh upstream into my branch recently
• I've ran tox successfully in local environment
• I've included docstrings and/or documentation and/or examples for my code (if this is a new feature)

[coveralls]

Pull Request Test Coverage Report for Build 11341327432

Details

• 2 of 2 (100.0%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-0.001%) to 74.603%

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Totals
Change from base Build 11340731760:	-0.001%
Covered Lines:	9417
Relevant Lines:	12747

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💛 - Coveralls