Merge pull request #579 from nervosnetwork/support-indexer-rpc #403

Job	Run time
linters (ubuntu-latest)	2m 40s
security-audit	3m 25s
linters (macos-11)	4m 39s
integration-test (ubuntu-latest)	10m 50s
unit-test (ubuntu-latest)	2m 29s
integration-test (macos-11)	1h 0m 31s
unit-test (macos-11)	4m 13s
unit-test (windows-2019)	4m 28s
ci	1s
	1h 33m 16s

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