Update zip requirement from 7.0 to 8.0 #160

Job	Run time
Rustfmt	15s
Code Coverage	20s
Build Wasm Examples (callback-example)	1m 0s
Build Wasm Examples (basic)	55s
Clippy	4m 48s
semver	49s
Tests (ubuntu-latest, firefox, plotly_ndarray,plotly_image,static_export_geckodriver,static_expor...	3m 27s
Tests (windows-latest, chrome, plotly_ndarray,plotly_image,static_export_chromedriver,debug)	7m 54s
Tests (macos-latest, chrome, plotly_ndarray,plotly_image,static_export_default,debug)	4m 45s
Tests (ubuntu-latest, chrome, plotly_ndarray,plotly_image,static_export_default,debug)	3m 26s
Build Book	4m 2s
Build Examples (basic_charts)	36s
Build Examples (kaleido)	1m 22s
Build Examples (scientific_charts)	35s
Build Examples (3d_charts)	37s
Build Examples (custom_controls)	37s
Build Examples (customization/multiple_plots_example)	38s
Build Examples (subplots)	35s
Build Examples (themes)	37s
Build Examples (statistical_charts)	35s
Build Examples (shapes)	36s
Build Examples (images)	59s
Build Examples (financial_charts)	37s
Build Examples (customization/consistent_static_format_export)	1m 46s
Build Examples (ndarray)	34s
Build Examples (maps)	45s
Build Examples (customization/density_mapbox_example)	35s
	43m 45s

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