Node-Polyglot: Added method has to interface

types/node-polyglot/index.d.ts

@@ -38,6 +38,8 @@ declare class Polyglot {
     locale(): string;
 
     locale(locale: string): void;
+
+    has(phrase: string): boolean;
 }
 
 export = Polyglot;

types/node-polyglot/node-polyglot-tests.ts

@@ -46,7 +46,10 @@ function translate(): void {
 	polyglot.t("i_like_to_write_in_language", {
 		_: "I like to write in %{language}.",
 		language: "Javascript"
-	});
+  });
+  
+  polyglot.has("hello");
+  polyglot.has("world");
 
 	polyglot.replace({
 		"hello": "hey",