chore(version): Bump version 1.7.0 #1398

Job	Run time
test / test-dart-vm (3.0.1)	1m 42s
test / test-dart-vm (stable)	2m 26s
ddc_test / test-dart-ddc (3.0.1, chrome)	2m 34s
native_test / test-dart-native (macos-latest)	2m 27s
ddc_test / test-dart-ddc (3.0.1, firefox)	2m 54s
native_test / test-dart-native (windows-latest)	2m 55s
ddc_test / test-dart-ddc (stable, chrome)	2m 32s
ddc_test / test-dart-ddc (stable, firefox)	2m 43s
dart2js_test / test-dart-2js (3.0.1, chrome)	3m 12s
dart2js_test / test-dart-2js (3.0.1, firefox)	3m 16s
dart2js_test / test-dart-2js (stable, chrome)	3m 1s
dart2js_test / test-dart-2js (stable, firefox)	3m 17s
	32m 59s

Provide feedback