Update zip requirement from 6.0 to 7.0 #127

Job	Run time
Tests (windows-latest, chrome, plotly_ndarray,plotly_image,static_export_chromedriver,debug)	6m 29s
semver	48s
Clippy	3m 55s
Tests (ubuntu-latest, chrome, plotly_ndarray,plotly_image,static_export_default,debug)	2m 43s
Code Coverage	10s
Rustfmt	14s
Build Wasm Examples (basic)	55s
Build Wasm Examples (callback-example)	53s
Build Book	3m 30s
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)	2m 52s
Build Examples (customization/consistent_static_format_export)	1m 26s
Build Examples (basic_charts)	26s
Build Examples (ndarray)	30s
Build Examples (financial_charts)	31s
Build Examples (scientific_charts)	27s
Build Examples (kaleido)	1m 23s
Build Examples (maps)	56s
Build Examples (3d_charts)	34s
Build Examples (customization/multiple_plots_example)	25s
Build Examples (customization/density_mapbox_example)	28s
Build Examples (custom_controls)	35s
Build Examples (shapes)	33s
Build Examples (statistical_charts)	32s
Build Examples (themes)	32s
Build Examples (subplots)	29s
Build Examples (images)	51s
	36m 19s

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