Changed IFilterPredicateFunc<T> to return boolean instead of T[] as per angular docs (https://docs.angularjs.org/api/ng/filter/filter)

angularjs/angular.d.ts

@@ -794,7 +794,7 @@ declare module angular {
     }
     
     interface IFilterPredicateFunc<T> {
-        (value: T, index: number, array: T[]): T[];
+        (value: T, index: number, array: T[]): boolean;
     }
     
     interface IFilterComparatorFunc<T> {