add animation support #30

Job	Run time
Clippy	3m 54s
Rustfmt	15s
semver	47s
Build Wasm Examples (callback-example)	56s
Build Book	3m 20s
Build Wasm Examples (basic)	54s
Tests (ubuntu-latest, chrome, plotly_ndarray,plotly_image,static_export_default,debug)	3m 6s
Tests (ubuntu-latest, firefox, plotly_ndarray,plotly_image,static_export_geckodriver,static_expor...	3m 12s
Tests (macos-latest, chrome, plotly_ndarray,plotly_image,static_export_default,debug)	3m 35s
Tests (windows-latest, chrome, plotly_ndarray,plotly_image,static_export_chromedriver,debug)	6m 10s
Code Coverage	11s
Build Examples (basic_charts)	29s
Build Examples (3d_charts)	31s
Build Examples (customization/density_mapbox_example)	33s
Build Examples (kaleido)	1m 18s
Build Examples (customization/consistent_static_format_export)	1m 21s
Build Examples (shapes)	25s
Build Examples (customization/multiple_plots_example)	32s
Build Examples (custom_controls)	31s
Build Examples (scientific_charts)	48s
Build Examples (images)	45s
Build Examples (ndarray)	31s
Build Examples (statistical_charts)	29s
Build Examples (subplots)	29s
Build Examples (maps)	43s
Build Examples (themes)	31s
Build Examples (financial_charts)	25s
	36m 41s

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