test: api integration tests for be #58

Job	Run time
API test set: accounts.test.ts / Node: lts/*	12m 51s
API test set: addresses.test.ts / Node: lts/*	13m 16s
API test set: batches.test.ts / Node: lts/*	11m 27s
API test set: blocks.test.ts / Node: lts/*	13m 19s
API test set: contracts.test.ts / Node: lts/*	11m 34s
API test set: logs.test.ts / Node: lts/*	11m 28s
API test set: stats.test.ts / Node: lts/*	11m 14s
API test set: tokens.test.ts / Node: lts/*	12m 6s
API test set: transactions.test.ts / Node: lts/*	16m 39s
	1h 53m 54s

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