Add `plotly_static` `async` API #73

Job	Run time
Tests (windows-latest, chrome, plotly_ndarray,plotly_image,static_export_chromedriver,debug)	1m 21s
Tests (ubuntu-latest, chrome, plotly_ndarray,plotly_image,static_export_default,debug)	1m 30s
Tests (ubuntu-latest, firefox, plotly_ndarray,plotly_image,static_export_geckodriver,static_expor...	1m 30s
Build Book	1m 30s
Code Coverage	13s
Clippy	1m 32s
Rustfmt	13s
Build Wasm Examples (callback-example)	1m 8s
Build Wasm Examples (basic)	1m 24s
Build Examples (basic_charts)	31s
Tests (macos-latest, chrome, plotly_ndarray,plotly_image,static_export_default,debug)	1m 35s
semver	1m 16s
Build Examples (3d_charts)	35s
Build Examples (maps)	41s
Build Examples (customization/density_mapbox_example)	27s
Build Examples (customization/multiple_plots_example)	35s
Build Examples (kaleido)	1m 16s
Build Examples (images)	40s
Build Examples (customization/consistent_static_format_export)	1m 24s
Build Examples (financial_charts)	31s
Build Examples (ndarray)	32s
Build Examples (custom_controls)	41s
Build Examples (subplots)	38s
Build Examples (scientific_charts)	31s
Build Examples (themes)	30s
Build Examples (shapes)	28s
Build Examples (statistical_charts)	35s
	23m 47s

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