feat(core)!: from_map is now fallible #1315

Job	Run time
check_docs	3m 38s
check_clippy	3m 10s
check_msrv	29s
build_all_features	4m 8s
build_all_platforms (ubuntu-latest)	2m 7s
build_all_platforms (macos-latest)	2m 12s
build_all_platforms (windows-latest)	4m 0s
build_default_features (ubuntu-latest)	32s
build_default_features (macos-latest)	35s
build_default_features (windows-latest)	1m 53s
build_under_wasm	41s
unit	6m 2s
	29m 27s

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