update version to 0.2.0 and enhance CI configuration for multi-platfo… #24

Job	Run time
build-and-test (windows-latest, Release)	5m 46s
build-and-test (macos-latest, Release)	3m 54s
build-and-test (windows-latest, Debug)	5m 23s
build-and-test (ubuntu-latest, Debug)	3m 7s
build-and-test (ubuntu-latest, Release)	3m 26s
build-and-test (macos-latest, Debug)	2m 49s
	24m 25s

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