Fix linter warnings and dependencies (#264)

* Fix minor linting errors

* Fix CLI getters linting errors

* Fix resolvers template in codegen

* Fix dependencies

packages/graph-node/src/watcher.ts

@@ -443,6 +443,7 @@ export class GraphWatcher {
 
     // Important to call _start for built subgraphs on instantiation!
     // TODO: Check api version https://github.com/graphprotocol/graph-node/blob/6098daa8955bdfac597cec87080af5449807e874/runtime/wasm/src/module/mod.rs#L533
+    // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
     this._dataSourceMap[dataSourceName].instance!.exports._start();
   }