factory method gino.ext.starlette

[jim-obrien-orig]

Change gino.ext.starlette to use factory method like the other extensions, as well as __init__. Now init with either Gino(app, ...) or db = Gino(); db.init_app(app)

[coveralls]

Pull Request Test Coverage Report for Build 1836

• 17 of 17 (100.0%) changed or added relevant lines in 2 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.004%) to 98.577%

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Totals
Change from base Build 1825:	0.004%
Covered Lines:	4227
Relevant Lines:	4288

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💛 - Coveralls

[jim-obrien-orig]

I noticed I changed pipenv.lock by mistake, so I'm resetting that to what it was on master. Same for .gitignore.

[wwwjfy]

Could you revert the format change made in the last commit? It makes the diff less readable and single line longer than 79 characters.

[jim-obrien-orig]

Sorry about that. Vim formatted on save. Don't usually use it for python.

[wwwjfy]

Thanks!