adding code of conduct (#261) #390

Job	Run time
Build Wasm Examples (wasm-yew-minimal)	48s
Clippy	2m 51s
Code Coverage	1m 52s
Build Examples (3d_charts)	24s
Build Examples (basic_charts)	25s
Rustfmt	12s
semver	1m 16s
Build Examples (custom_controls)	23s
Tests (ubuntu-latest)	1m 51s
Build Examples (financial_charts)	26s
Tests (windows-latest)	4m 0s
Build Examples (images)	42s
Tests (macos-latest)	1m 39s
Build Examples (kaleido)	1m 30s
Build Examples (maps)	23s
Build Examples (ndarray)	22s
Build Examples (scientific_charts)	29s
Build Examples (shapes)	24s
Build Examples (subplots)	22s
	20m 19s

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