Fix Lint errors in StringUtility.ts (#479)

.eslintignore

@@ -248,8 +248,6 @@ src/Shared/ExplorerSettings.ts
 src/Shared/PriceEstimateCalculator.ts
 src/Shared/StorageUtility.test.ts
 src/Shared/StorageUtility.ts
-src/Shared/StringUtility.test.ts
-src/Shared/StringUtility.ts
 src/Shared/appInsights.ts
 src/SparkClusterManager/ArcadiaResourceManager.ts
 src/SparkClusterManager/SparkClusterManager.ts

src/Explorer/Panes/SettingsPane.ts

@@ -5,7 +5,7 @@ import { ConsoleDataType } from "../Menus/NotificationConsole/NotificationConsol
 import { ContextualPaneBase } from "./ContextualPaneBase";
 import { LocalStorageUtility, StorageKey } from "../../Shared/StorageUtility";
 import * as NotificationConsoleUtils from "../../Utils/NotificationConsoleUtils";
-import { StringUtility } from "../../Shared/StringUtility";
+import * as StringUtility from "../../Shared/StringUtility";
 import { configContext } from "../../ConfigContext";
 
 export class SettingsPane extends ContextualPaneBase {

src/Shared/StorageUtility.ts

@@ -1,4 +1,4 @@
-import { StringUtility } from "./StringUtility";
+import * as StringUtility from "./StringUtility";
 
 export class LocalStorageUtility {
   public static hasItem(key: StorageKey): boolean {

src/Shared/StringUtility.test.ts

@@ -1,4 +1,4 @@
-import { StringUtility } from "./StringUtility";
+import * as StringUtility from "./StringUtility";
 
 describe("String utility", () => {
   it("Convert to integer from string", () => {

src/Shared/StringUtility.ts

@@ -1,9 +1,7 @@
-export class StringUtility {
-  public static toNumber(num: string | null): number {
+export function toNumber(num: string | null): number {
   return Number(num);
 }
 
-  public static toBoolean(valueStr: string | null): boolean {
+export function toBoolean(valueStr: string | null): boolean {
   return valueStr === "true";
 }
-}