Issue #2248977 by Berdir: Complete support for multi-value base fields in ContentEntitySchemaHandler and use it for the user.roles field
Issue #2312093 by alexpott, yched, andypost, swentel | xjm: Rename FieldInstanceConfig to FieldConfig.
Issue #697760 by sun: Replace getInfo() in tests with native phpDoc + annotations (following PHPUnit).