* Refactor watch-contract CLI to cli package
* Use watch-contract from cli in eden and erc721 watchers
* Use watch-contract from cli in all watchers
* Pass an object containing clients to refactored CLI
Co-authored-by: nabarun <nabarun@deepstacksoft.com>
* Upgrade apollo server to v3 in eden-watcher
* Upgrade apollo server to v3 in other watchers and codegen
* Refactor common server code to util
* Pass express application object in the method to create server
* Remove unnecessary import