added _(...).compact def

lodash/lodash-tests.ts

@@ -105,6 +105,8 @@ result = <number[]>_([1, 2, 3]).valueOf();
  * Arrays *
  *************/
 result = <any[]>_.compact([0, 1, false, 2, '', 3]);
+	result = <_.LoDashWrapper<any[]>>_([0, 1, false, 2, '', 3]).compact();
+
 result = <number[]>_.difference([1, 2, 3, 4, 5], [5, 2, 10]);
 
 result = <number[]>_.rest([1, 2, 3]);

lodash/lodash.d.ts

@@ -262,6 +262,13 @@ declare module _ {
 	**/
 	export function compact<T>(array: List<T>): T[];
 
+		interface LoDashWrapper<T> {
+			/**
+			* @see _.compact
+			**/
+			compact<T>(): LoDashWrapper<T[]>;
+		}
+
 	/**
 	* Creates an array excluding all values of the provided arrays using strict equality for comparisons
 	* , i.e. ===.