add definition for the angular translate filter

angular-translate/angular-translate-tests.ts

@@ -36,4 +36,9 @@ app.controller('Ctrl', ($scope: Scope, $translate: angular.translate.ITranslateS
     $scope['changeLanguage'] = function (key: any) {
         $translate.use(key);
     };
+}).run(($filter: ng.IFilterService) => {
+    var x: string;
+    x = $filter('translate')('something');
+    x = $filter('translate')('something', {});
+    x = $filter('translate')('something', {}, '');
 });

angular-translate/angular-translate.d.ts

@@ -108,3 +108,11 @@ declare module angular.translate {
         useLoaderCache(cache?: any): ITranslateProvider;
     }
 }
+
+declare module angular {
+    interface IFilterService {
+        (name:'translate'): {
+            (translationId: string, interpolateParams?: any, interpolation?: string): string;
+        };
+    }
+}