Accept `Map<String, dynamic>` in `Hint` class #81

Job	Run time
cancel-previous-workflow	3s
android \| ubuntu-latest \| stable	1m 19s
android \| ubuntu-latest \| beta	1m 14s
linux \| ubuntu-latest \| stable	1m 48s
linux \| ubuntu-latest \| beta	2m 19s
ios \| macos-latest \| stable	2m 46s
macos \| macos-latest \| stable	2m 14s
windows \| windows-latest \| stable	2m 26s
windows \| windows-latest \| beta	2m 16s
analyze / analyze	1m 55s
analyze / cancel-previous-workflow	3s
analyze / package-analysis	2m 26s
	20m 49s

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