[node-polyglot] Fix t and locale overloads to allow optional arguments (#31522)

* Updated node-polyglot types

* bumped package version

types/node-polyglot/index.d.ts

@@ -1,9 +1,9 @@
-// Type definitions for node-polyglot v0.4.2
+// Type definitions for node-polyglot v0.4.3
 // Project: https://github.com/airbnb/polyglot.js
 // Definitions by: Tim Jackson-Kiely <https://github.com/timjk>
+//                 Liam Ross <https://github.com/liamross>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
 
-
 declare namespace Polyglot {
     interface InterpolationOptions {
         smart_count?: number | { length: number };
@@ -25,19 +25,13 @@ declare class Polyglot {
 
     extend(phrases: any): void;
 
-    t(phrase: string): string;
-
-    t(phrase: string, smartCount: number): string;
-
-    t(phrase: string, interpolationOptions: Polyglot.InterpolationOptions): string;
+    t(phrase: string, options?: number | Polyglot.InterpolationOptions): string;
 
     clear(): void;
 
     replace(phrases: any): void;
 
-    locale(): string;
-
-    locale(locale: string): void;
+    locale(locale?: string): void;
 
     has(phrase: string): boolean;
 }