Add chainable definitions for _(...).toArray.

lodash/lodash-tests.ts

@@ -556,7 +556,11 @@ result = <number[]>_([1, 2, 3]).sortBy(function (num) { return Math.sin(num); })
 result = <number[]>_([1, 2, 3]).sortBy(function (num) { return this.sin(num); }, Math).value();
 result = <string[]>_(['banana', 'strawberry', 'apple']).sortBy('length').value();
 
-(function (a: number, b: number, c: number, d: number) { return _.toArray(arguments).slice(1); })(1, 2, 3, 4);
+(function (a: number, b: number, c: number, d: number): Array<number> { return _.toArray(arguments).slice(1); })(1, 2, 3, 4);
+result = <number[]>_.toArray([1, 2, 3, 4]);
+(function (a: number, b: number, c: number, d: number): Array<number> { return _(arguments).toArray<number>().slice(1).value(); })(1, 2, 3, 4);
+result = <number[]>_([1,2,3,4]).toArray().value();
+
 
 result = <IStoogesCombined[]>_.where(stoogesCombined, { 'age': 40 });
 result = <IStoogesCombined[]>_.where(stoogesCombined, { 'quotes': ['Poifect!'] });

lodash/lodash.d.ts

@@ -4520,6 +4520,20 @@ declare module _ {
         toArray<T>(collection: Dictionary<T>): T[];
     }
 
+    interface LoDashArrayWrapper<T> {
+        /**
+        * @see _.toArray
+        **/
+        toArray(): LoDashArrayWrapper<T>;
+    }
+
+    interface LoDashObjectWrapper<T> {
+        /**
+        * @see _.toArray
+        **/
+        toArray<TValue>(): LoDashArrayWrapper<TValue>;
+    }
+
     //_.where
     interface LoDashStatic {
         /**