add animation support #39

Job	Run time
Rustfmt	16s
semver	46s
Clippy	1m 34s
Tests (ubuntu-latest, chrome, plotly_ndarray,plotly_image,static_export_default,debug)	1m 32s
Tests (ubuntu-latest, firefox, plotly_ndarray,plotly_image,static_export_geckodriver,static_expor...	1m 33s
Tests (macos-latest, chrome, plotly_ndarray,plotly_image,static_export_default,debug)	1m 36s
Tests (windows-latest, chrome, plotly_ndarray,plotly_image,static_export_chromedriver,debug)	1m 22s
Build Book	1m 34s
Code Coverage	8s
Build Wasm Examples (basic)	57s
Build Wasm Examples (callback-example)	57s
Build Examples (customization/consistent_static_format_export)	1m 16s
Build Examples (statistical_charts)	32s
Build Examples (customization/multiple_plots_example)	36s
Build Examples (custom_controls)	32s
Build Examples (3d_charts)	32s
Build Examples (ndarray)	31s
Build Examples (financial_charts)	35s
Build Examples (customization/density_mapbox_example)	31s
Build Examples (shapes)	38s
Build Examples (scientific_charts)	34s
Build Examples (themes)	30s
Build Examples (subplots)	27s
Build Examples (maps)	43s
Build Examples (basic_charts)	35s
Build Examples (kaleido)	1m 23s
Build Examples (images)	44s
	22m 54s

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