chore(version): bump version for v2 #1749

Job	Run time
test / test-dart-vm (3.3.0)	1m 23s
test / test-dart-vm (stable)	1m 42s
dart2js_test / test-dart-2js (3.3.0, chrome)	2m 15s
native_test / test-dart-native (macos-latest)	1m 26s
ddc_test / test-dart-ddc (3.3.0, chrome)	2m 0s
dart2js_test / test-dart-2js (3.3.0, firefox)	2m 13s
native_test / test-dart-native (windows-latest)	3m 0s
ddc_test / test-dart-ddc (3.3.0, firefox)	2m 8s
dart2js_test / test-dart-2js (stable, chrome)	1m 56s
ddc_test / test-dart-ddc (stable, chrome)	2m 15s
dart2js_test / test-dart-2js (stable, firefox)	2m 5s
ddc_test / test-dart-ddc (stable, firefox)	2m 14s
	24m 37s

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