* Remove fields no longer present in schema.
* Refactor code to work with log_cids change in eth-server.
* Refactor process event to save events from logs.
* Use constants for erc20 event names.
* Implement watch blocks in erc20-watcher similar to uni-watcher.
* Moved common methods to util.
* Implement eventsInRange query in erc20-watcher.
* Filter unknown event in database query.
* Change dependencies version to be same in all packages.
Co-authored-by: nabarun <nabarun@deepstacksoft.com>
