Config typedef include/exclude no longer works.

[mannprerak2]

It seems that the config typedefs -> exclude/include is no longer working (Probably since 6.1.0).
I tracked this change down to
https://github.com/dart-lang/ffigen/blob/e262c9a1c6d32d69c8434be98e466e504a6a7f7a/lib/src/header_parser/sub_parsers/typedefdecl_parser.dart#L33-L42

First added in (6.1.0) https://github.com/dart-lang/ffigen/pull/431/files#diff-aae6aaed3ca43f5c68f72ffbb689be5b81821be3b37f925deb09ada6b1412697R42

Is this intentional? Simply removing ignoreFilter from here should otherwise solve this for C bindings.

@liamappelbe @dcharkes

[liamappelbe]

I don't remember exactly why I added that, but I think the test coverage for exclude-all-by-default is good enough that you can just remove it and see if anything breaks.

But many of the other parse methods take this ignoreFilter flag. Why should typedefs be different?

[mannprerak2]

One reason I could think is that typedefs are non-essential, one can always just use the underlying type instead.

ffigen only generated referred typedefs, so an include/exclude config is basically meaningless if typedefs use ignoreFilter.