Description
BIC and IBAN validators both accept values with spaces that are removed before validation.
IBAN validator accepts values with lower case that are upper-ed before validation, but BIC validator refuses lower case values.

Theses validators should have a consistent behavior on case.

And I'm wondering why these validators accept spaces as it's a display feature.

A solution is to create a strict mode that rejects values with spaces and lower case.
Default value would be false for BC and can be set to true on a major update.

I can provide a PR with unit tests if you want.