Bump version to 0.4.0-preview.3 again #858

Job	Run time
build (ubuntu-latest, Debug)	4m 22s
build (macos-latest, Release)	4m 53s
build (ubuntu-latest, Release)	6m 11s
build (windows-latest, Release)	7m 58s
build (macos-latest, Debug)	4m 31s
build (windows-latest, Debug)	6m 59s
publish-coverage	0s
	34m 54s

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