Update dirs requirement from 5.0 to 6.0 #24

Job	Run time
semver	41s
Tests (ubuntu-latest, chrome, plotly_ndarray,plotly_image,static_export_default,debug)	3m 5s
Tests (windows-latest, chrome, plotly_ndarray,plotly_image,static_export_chromedriver,debug)	6m 4s
Tests (ubuntu-latest, firefox, plotly_ndarray,plotly_image,static_export_geckodriver,static_expor...	3m 3s
Tests (macos-latest, chrome, plotly_ndarray,plotly_image,static_export_default,debug)	3m 46s
Clippy	4m 7s
Code Coverage	10s
Build Wasm Examples (basic)	59s
Build Book	3m 24s
Rustfmt	15s
Build Wasm Examples (callback-example)	53s
Build Examples (basic_charts)	37s
Build Examples (3d_charts)	30s
Build Examples (customization/consistent_static_format_export)	1m 22s
Build Examples (customization/multiple_plots_example)	34s
Build Examples (images)	53s
Build Examples (kaleido)	1m 18s
Build Examples (ndarray)	29s
Build Examples (statistical_charts)	29s
Build Examples (customization/density_mapbox_example)	43s
Build Examples (financial_charts)	35s
Build Examples (scientific_charts)	36s
Build Examples (custom_controls)	29s
Build Examples (shapes)	35s
Build Examples (subplots)	36s
Build Examples (maps)	41s
Build Examples (themes)	34s
	37m 28s

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