Make `RequestBody` attribute IS_REPEATABLE (zircote#1445)

Add missing `description` property to `PathItem` (zircote#1438)

Add MediaType as possible type to RequestBody (zircote#1426)

Refactor annotation root comparisons (zircote#1431)

Add scratch test using custom attributes (zircote#1423)

Handle promoted property inline docblocks for attributes (zircote#1422)

Also:
* avoid generating `nullable: false` output
* make custom property names for attribute `Property` stick

Allow FQCN in `$ref` (zircote#1418)

Allow a ref to be nullable (zircote#1391)

Add debug logging of files being analysed (zircote#1411)

Make schema lookup work for custom schema implementations (zircote#1403)