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

lodash/lodash-tests.ts

@@ -884,6 +884,7 @@ result = <HasName>_({ 'name': 'moe', 'age': 40 }).omit(function (value) {
 }).value();
 
 result = <any[][]>_.pairs({ 'moe': 30, 'larry': 40 });
+result = <any[][]>_({ 'moe': 30, 'larry': 40 }).pairs().value();
 
 result = <HasName>_.pick({ 'name': 'moe', '_userid': 'moe1' }, 'name');
 result = <HasName>_.pick({ 'name': 'moe', '_userid': 'moe1' }, ['name']);

lodash/lodash.d.ts

@@ -5423,6 +5423,13 @@ declare module _ {
         pairs(object: any): any[][];
     }
 
+    interface LoDashObjectWrapper<T> {
+        /**
+        * @see _.pairs
+        **/
+        pairs(): LoDashArrayWrapper<any[]>;
+    }
+
     //_.picks
     interface LoDashStatic {
         /**