Enforce some naming conventions (#4813)

src/renderer/utils/__tests__/storageHelper.test.ts

@@ -7,11 +7,11 @@ import { observable, reaction } from "mobx";
 import { StorageHelper } from "../storageHelper";
 import { delay } from "../../../common/utils/delay";
 
-type StorageModel = {
+interface StorageModel {
   [prop: string]: any /*json-serializable*/;
   message?: string;
   description?: any;
-};
+}
 
 describe("renderer/utils/StorageHelper", () => {
   describe("Using custom StorageAdapter", () => {

src/renderer/utils/cssNames.ts

@@ -6,9 +6,7 @@
 // Helper for combining css classes inside components
 
 export type IClassName = string | string[] | IClassNameMap;
-export type IClassNameMap = {
-  [className: string]: boolean | any;
-};
+export type IClassNameMap = Record<string, any>;
 
 export function cssNames(...args: IClassName[]): string {
   const map: IClassNameMap = {};