chore(version): bump version for v2 #1766

Job	Run time
test / test-dart-vm (3.3.0)	1m 41s
test / test-dart-vm (stable)	1m 42s
dart2js_test / test-dart-2js (3.3.0, chrome)	16m 1s
native_test / test-dart-native (macos-latest)	1m 24s
ddc_test / test-dart-ddc (3.3.0, chrome)	10m 14s
dart2js_test / test-dart-2js (3.3.0, firefox)	16m 28s
native_test / test-dart-native (windows-latest)	3m 25s
ddc_test / test-dart-ddc (3.3.0, firefox)	11m 15s
dart2js_test / test-dart-2js (stable, chrome)	16m 37s
ddc_test / test-dart-ddc (stable, chrome)	10m 6s
dart2js_test / test-dart-2js (stable, firefox)	16m 54s
ddc_test / test-dart-ddc (stable, firefox)	10m 1s
	1h 55m 48s

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