Add Splom and Parcats trace types #247

Job	Run time
Build Wasm Examples (callback-example)	1m 6s
Rustfmt	16s
Clippy	5m 50s
Tests (ubuntu-latest, firefox, plotly_ndarray,plotly_image,static_export_geckodriver,static_expor...	3m 33s
Build Book	4m 42s
Code Coverage	18s
Tests (ubuntu-latest, chrome, plotly_ndarray,plotly_image,static_export_default,debug)	3m 46s
semver	51s
Build Wasm Examples (basic)	1m 5s
Tests (macos-latest, chrome, plotly_ndarray,plotly_image,static_export_default,debug)	5m 18s
Tests (windows-latest, chrome, plotly_ndarray,plotly_image,static_export_chromedriver,debug)	8m 29s
Build Examples (3d_charts)	38s
Build Examples (customization/density_mapbox_example)	34s
Build Examples (custom_controls)	33s
Build Examples (customization/multiple_plots_example)	39s
Build Examples (basic_charts)	39s
Build Examples (ndarray)	38s
Build Examples (customization/consistent_static_format_export)	1m 49s
Build Examples (images)	58s
Build Examples (financial_charts)	36s
Build Examples (statistical_charts)	35s
Build Examples (kaleido)	1m 33s
Build Examples (maps)	48s
Build Examples (subplots)	35s
Build Examples (scientific_charts)	36s
Build Examples (themes)	36s
Build Examples (shapes)	42s
	47m 43s

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