lodash: Add flattenDepth() for LoDashStatic (#10013)

* lodash: Add flattenDepth() for LoDashStatic

* lodash(flattenDepth): Add optional tag to depth & declare module

lodash/lodash.d.ts

@@ -2000,6 +2000,18 @@ declare module _ {
         flattenDeep<T>(): LoDashExplicitArrayWrapper<T>;
     }
 
+    // _.flattenDepth
+    interface LoDashStatic {
+        /**
+        * Recursively flatten array up to depth times.
+        *
+        * @param array The array to recursively flatten.
+        * @param number The maximum recursion depth.
+        * @return Returns the new flattened array.
+        */
+        flattenDepth<T>(array: ListOfRecursiveArraysOrValues<T>, depth?: number): T[];
+     }
+
     //_.fromPairs
     interface LoDashStatic {
         /**
@@ -19414,15 +19426,10 @@ declare module "lodash/flattenDeep" {
    export = flattenDeep;
 }
 
-/**
-* uncoment it if definition exists
-*/
-/*
 declare module "lodash/flattenDepth" {
    const flattenDepth: typeof _.flattenDepth;
    export = flattenDepth;
 }
-*/
 
 declare module "lodash/flip" {
    const flip: typeof _.flip;