Support for wildcard attributes

[cpsievert]

https://github.com/plotly/dash/pull/237/files
plotly/dash-html-components#40

[cpsievert]

Implemented in https://github.com/plotly/dashTranspileR/commit/98c8becee1455bb9f833e0bce52bb3ddec8a4948