added _(...).difference defs

lodash/lodash-tests.ts

@@ -121,6 +121,7 @@ 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 = <_.LoDashWrapper<number[]>>_([1, 2, 3, 4, 5]).difference([5, 2, 10]);
 
 result = <number[]>_.rest([1, 2, 3]);
 result = <number[]>_.rest([1, 2, 3], 2);

lodash/lodash.d.ts

@@ -321,6 +321,14 @@ declare module _ {
 		array: List<T>,
 		...others: List<T>[]): T[];
 
+		interface LoDashWrapper<T> {
+			/**
+			* @see _.difference
+			**/
+			difference(
+				...others: List<any>[]): LoDashWrapper<any[]>;
+		}
+
 	/**
 	* @see _.rest
 	**/