Merge pull request #6448 from chrootsu/lodash-add

lodash: signatures of the method _.add changed

lodash/lodash-tests.ts

@@ -2992,8 +2992,20 @@ module TestToPlainObject {
  ********/
 
 // _.add
-result = <number>_.add(1, 1);
-result = <number>_(1).add(1);
+module TestAdd {
+    {
+        let result: number;
+
+        result = _.add(1, 1);
+        result = _(1).add(1);
+    }
+
+    {
+        let result: _.LoDashExplicitWrapper<number>;
+
+        result = _(1).chain().add(1);
+    }
+}
 
 // _.ceil
 module TestCeil {

lodash/lodash.d.ts

@@ -7447,11 +7447,15 @@ declare module _ {
     interface LoDashStatic {
         /**
          * Adds two numbers.
+         *
          * @param augend The first number to add.
          * @param addend The second number to add.
          * @return Returns the sum.
          */
-        add(augend: number, addend: number): number;
+        add(
+            augend: number,
+            addend: number
+        ): number;
     }
 
     interface LoDashImplicitWrapper<T> {
@@ -7461,6 +7465,13 @@ declare module _ {
         add(addend: number): number;
     }
 
+    interface LoDashExplicitWrapper<T> {
+        /**
+         * @see _.add
+         */
+        add(addend: number): LoDashExplicitWrapper<number>;
+    }
+
     //_.ceil
     interface LoDashStatic {
         /**