Clear cache of latest entities on event processing error (#201)

* Clear cache of latest entities on event processing error

* Remove lighthouse-watcher and update ethersjs version

* Handle GraphDecimal type in state entity

* Add option for comparing all entities using paginate

* Clear pruned cached entities at intervals

* Move ipld-demo to graph-node package and remove reset-dbs script

* Implement changes in all watchers and codegen

package.json

@@ -17,7 +17,6 @@
     "test": "lerna run test --stream --ignore @cerc-io/*-watcher",
     "build": "lerna run build --stream",
     "build:watch": "lerna run build --stream --parallel -- -w",
-    "db:reset": "sudo ./scripts/reset-dbs.sh",
     "prepare": "husky install",
     "publish:workspace": "yarn build && lerna publish"
   }