lodash: added _.keyIn() method

lodash/lodash-tests.ts

@@ -1018,6 +1018,9 @@ result = <boolean>_.isUndefined(void 0);
 result = <string[]>_.keys({ 'one': 1, 'two': 2, 'three': 3 });
 result = <string[]>_({ 'one': 1, 'two': 2, 'three': 3 }).keys().value();
 
+result = <string[]>_.keysIn({ 'one': 1, 'two': 2, 'three': 3 });
+result = <string[]>_({ 'one': 1, 'two': 2, 'three': 3 }).keysIn().value();
+
 var mergeNames = {
     'stooges': [
         { 'name': 'moe' },

lodash/lodash.d.ts

@@ -6003,6 +6003,23 @@ declare module _ {
         keys(): LoDashArrayWrapper<string>
     }
 
+    //_.keysIn
+    interface LoDashStatic {
+        /**
+         * Creates an array of the own and inherited enumerable property names of object.
+         * @param object The object to query.
+         * @return An array of property names.
+         **/
+        keysIn(object?: any): string[];
+    }
+
+    interface LoDashObjectWrapper<T> {
+        /**
+         * @see _.keysIn
+         **/
+        keysIn(): LoDashArrayWrapper<string>
+    }
+
     //_.mapValues
     interface LoDashStatic {
         /**