Add ScatterGeo trace support #529

Job	Run time
Clippy	3m 0s
Tests (ubuntu-latest)	2m 11s
semver	44s
Rustfmt	14s
Tests (macos-latest)	2m 37s
Tests (windows-latest)	4m 33s
Build Wasm Examples (basic)	51s
Build Wasm Examples (callback-example)	49s
Code Coverage	10s
Build Examples (custom_controls)	25s
Build Examples (financial_charts)	24s
Build Examples (images)	38s
Build Examples (3d_charts)	24s
Build Examples (ndarray)	23s
Build Examples (maps)	23s
Build Examples (scientific_charts)	21s
Build Examples (kaleido)	1m 10s
Build Examples (shapes)	24s
Build Examples (subplots)	22s
Build Examples (basic_charts)	24s
	20m 27s

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