chore(version): Bump version 1.7.0 #1544

Job	Run time
test / test-dart-vm (3.0.1)	1m 45s
test / test-dart-vm (stable)	1m 45s
native_test / test-dart-native (macos-latest)	2m 32s
ddc_test / test-dart-ddc (3.0.1, chrome)	12m 52s
native_test / test-dart-native (windows-latest)	3m 47s
ddc_test / test-dart-ddc (3.0.1, firefox)	11m 50s
dart2js_test / test-dart-2js (3.0.1, chrome)	19m 36s
ddc_test / test-dart-ddc (stable, chrome)	11m 3s
dart2js_test / test-dart-2js (3.0.1, firefox)	19m 31s
ddc_test / test-dart-ddc (stable, firefox)	10m 36s
dart2js_test / test-dart-2js (stable, chrome)	17m 14s
dart2js_test / test-dart-2js (stable, firefox)	18m 6s
	2h 10m 37s

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