one_member_abstracts should be allowed

[passsy]

dart-lint/lib/analysis_options.yaml

Lines 348 to 350 in c83db92

	# Defining interfaces (abstract classes), with only one method, makes sense architecture wise
	# https://dart-lang.github.io/linter/lints/one_member_abstracts.html
	- one_member_abstracts

As already definied in the comment, it makes sense to define interfaces (abstract classes in dart) architecture wise when defining boundaries. A Function reference is not a good replacement because it is very likely that new functions will be added which then would result in a breaking change.

Seems like it is accidentally enabled