OPDATA-6934 add delta and snapshot modes + related linter refactoring…#806

mmcallister-cll wants to merge 2 commits into

mainsmartcontractkit/ea-framework-js:mainfrom

OPDATA-6934-batchSubscribeModesmartcontractkit/ea-framework-js:OPDATA-6934-batchSubscribeModeCopy head branch name to clipboard