Enable for-in lint rule (#3013)

### Description

https://eslint.org/docs/latest/rules/guard-for-in

### Drive-by changes

Fix lint error in SDK Sealevel adapter

### Backward compatibility

Yes

.eslintrc

@@ -23,6 +23,7 @@
     "no-extra-boolean-cast": ["error"],
     "no-ex-assign": ["error"],
     "no-constant-condition": ["off"],
+    "guard-for-in": ["error"],
     "@typescript-eslint/ban-ts-comment": ["off"],
     "@typescript-eslint/explicit-module-boundary-types": ["off"],
     "@typescript-eslint/no-explicit-any": ["off"],

typescript/sdk/src/ism/HyperlaneIsmFactory.ts

@@ -165,7 +165,7 @@ export class HyperlaneIsmFactory extends HyperlaneApp<ProxyFactoryFactories> {
     //   ? this.getContracts(chain).defaultFallbackRoutingIsmFactory
     // : this.getContracts(chain).routingIsmFactory;
     const isms: ChainMap<Address> = {};
-    for (const origin in config.domains) {
+    for (const origin of Object.keys(config.domains)) {
       const ism = await this.deploy(chain, config.domains[origin], origin);
       isms[origin] = ism.address;
     }

typescript/sdk/src/token/adapters/SealevelTokenAdapter.ts

@@ -302,7 +302,7 @@ export abstract class SealevelHypTokenAdapter
     return tx;
   }
 
-  async getIgpKeys() {
+  async getIgpKeys(): Promise<KeyListParams['igp']> {
     const tokenData = await this.getTokenAccountData();
     if (!tokenData.interchain_gas_paymaster) return undefined;
     const igpConfig = tokenData.interchain_gas_paymaster;