Bump `ckb-sdk-rust` to `3.7.0` #470

Job	Run time
security-audit	3m 22s
linters (ubuntu-latest)	2m 45s
unit-test (ubuntu-latest)	3m 42s
linters (macos-latest)	1m 30s
build-examples (ubuntu-latest)	2m 9s
unit-test (macos-latest)	2m 7s
build-examples (macos-latest)	1m 41s
unit-test (windows-2019)	6m 22s
build-examples (windows-2019)	5m 52s
ci	1s
	29m 31s

Provide feedback