chore(version): bump version for v2 #1756

Job	Run time
test / test-dart-vm (3.3.0)	2m 34s
test / test-dart-vm (stable)	2m 23s
dart2js_test / test-dart-2js (3.3.0, chrome)	2m 48s
ddc_test / test-dart-ddc (3.3.0, chrome)	2m 39s
dart2js_test / test-dart-2js (3.3.0, firefox)	2m 50s
ddc_test / test-dart-ddc (3.3.0, firefox)	3m 8s
dart2js_test / test-dart-2js (stable, chrome)	2m 46s
ddc_test / test-dart-ddc (stable, chrome)	2m 59s
dart2js_test / test-dart-2js (stable, firefox)	3m 26s
ddc_test / test-dart-ddc (stable, firefox)	3m 7s
native_test / test-dart-native (macos-latest)	1m 54s
native_test / test-dart-native (windows-latest)	3m 24s
	33m 58s

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