optimize - deepmerge : use spread operator

Author: Raphael Balet

package.json

@@ -1,6 +1,6 @@
 {
   "name": "ngx-translate-multi-http-loader",
-  "version": "9.1.2",
+  "version": "9.1.3",
   "license": "MIT",
   "author": "Raphael Balet",
   "maintainers": [

projects/multi-http-loader/package.json

@@ -1,6 +1,6 @@
 {
   "name": "ngx-translate-multi-http-loader",
-  "version": "9.1.2",
+  "version": "9.1.3",
   "license": "MIT",
   "author": "Raphael Balet",
   "maintainers": [

projects/multi-http-loader/src/lib/multi-http-loader.ts

@@ -30,17 +30,6 @@ export class MultiTranslateHttpLoader implements TranslateLoader {
       )
     })
 
-    return forkJoin(requests).pipe(map((response) => this._deepmergeAll(response)))
-  }
-
-  // @TODO : wait from https://github.com/RebeccaStevens/deepmerge-ts/issues/255 to be merged
-  private _deepmergeAll(array) {
-    if (!Array.isArray(array)) {
-      return {}
-    }
-
-    return array.reduce((prev, next) => {
-      return deepmerge(prev, next)
-    }, {})
+    return forkJoin(requests).pipe(map((response) => deepmerge(...response)))
   }
 }