Feat: Using the configured logger for debugging uploads

[RobinTail]

I made the logger in express-fileupload configurable:
richardgirges/express-fileupload#371

So now the configured logger can be used for debugging the upload instead of console.
That, however, also requires the types updated in a separate repo (waiting for that):
DefinitelyTyped/DefinitelyTyped#69016

[coveralls-official]

coverage: 100.0%. remained the same
when pulling bd18cb3 on feat-logging-upload
into 12c0775 on master.

[RobinTail]

ok