Accept `Map<String, dynamic>` in `Hint` class #54

Job	Run time
android \| ubuntu-latest \| stable	1m 8s
cancel-previous-workflow	5s
android \| ubuntu-latest \| beta	1m 3s
linux \| ubuntu-latest \| stable	1m 35s
linux \| ubuntu-latest \| beta	1m 31s
ios \| macos-latest \| stable	1s
macos \| macos-latest \| stable	1s
windows \| windows-latest \| stable	2m 32s
windows \| windows-latest \| beta	2m 12s
analyze / analyze	1m 36s
analyze / cancel-previous-workflow	2s
analyze / package-analysis	1m 1s
	12m 47s

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