Bump deps (#3686)

* Bump deps

* Add override (as applicable)

packages/metadata/package.json

@@ -19,7 +19,7 @@
   "bugs": "https://github.com/polkadot-js/api/issues",
   "homepage": "https://github.com/polkadot-js/api/tree/master/packages/type-metadata#readme",
   "dependencies": {
-    "@babel/runtime": "^7.14.5",
+    "@babel/runtime": "^7.14.6",
     "@polkadot/types": "4.15.2-2",
     "@polkadot/types-known": "4.15.2-2",
     "@polkadot/util": "^6.9.1",

packages/metadata/src/MetadataVersioned.ts

@@ -142,7 +142,7 @@ export class MetadataVersioned extends Struct {
   /**
    * @description Converts the Object to JSON, typically used for RPC transfers
    */
-  public toJSON (): Record<string, AnyJson> {
+  public override toJSON (): Record<string, AnyJson> {
     // HACK(y): ensure that we apply the aliases if we have not done so already, this is
     // needed to ensure we have the correct overrides (which is only applied in toLatest)
     // eslint-disable-next-line no-unused-expressions