Add `plotly_static` `async` API #65

Job	Run time
Code Coverage	23s
Build Wasm Examples (basic)	58s
Build Book	3m 34s
Build Wasm Examples (callback-example)	54s
Clippy	4m 1s
Tests (ubuntu-latest, chrome, plotly_ndarray,plotly_image,static_export_default,debug)	3m 37s
Tests (windows-latest, chrome, plotly_ndarray,plotly_image,static_export_chromedriver,debug)	6m 27s
Rustfmt	17s
Tests (ubuntu-latest, firefox, plotly_ndarray,plotly_image,static_export_geckodriver,static_expor...	3m 22s
Build Examples (3d_charts)	37s
semver	44s
Build Examples (custom_controls)	34s
Build Examples (basic_charts)	39s
Tests (macos-latest, chrome, plotly_ndarray,plotly_image,static_export_default,debug)	4m 2s
Build Examples (customization/multiple_plots_example)	35s
Build Examples (ndarray)	32s
Build Examples (maps)	47s
Build Examples (customization/consistent_static_format_export)	1m 27s
Build Examples (kaleido)	1m 25s
Build Examples (scientific_charts)	33s
Build Examples (customization/density_mapbox_example)	35s
Build Examples (financial_charts)	35s
Build Examples (subplots)	33s
Build Examples (statistical_charts)	35s
Build Examples (themes)	38s
Build Examples (images)	46s
Build Examples (shapes)	40s
	39m 50s

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