Changes:

• Add fit-x and fit-y autosize options to aid responsive layout.
• Add flatten transform to map array values to multiple data objects.
• Add signal support for mark interactive property.
• Add pointRadius parameter for geopath and geoshape transforms. (See new earthquakes example!)
• Add mark clip support to clip to paths or projected geo sphere. (See new projections example!)
• Add support for projection-free geoArea, geoBounds, & geoCentroid expression functions.
• Add resize listeners to View API.
• Fix View signal and event listener registration to be idempotent (suppress duplicate handlers).
• Fix dataflow runAfter execution order across consecutive cycles.
• Fix number coercion within extent calculation for quantitative scale domains.
• Fix projection type registration with type check and lowercase coercion.
• Fix and streamline TopoJSON loading.
• Fix arc bounds calculation error.
• Update documentation.
• Update dependencies.