edit for tests

Author: Ярослав Кикоть

angular.json

@@ -71,7 +71,7 @@
             "main": "src/test.ts",
             "polyfills": "src/polyfills.ts",
             "tsConfig": "src/tsconfig.spec.json",
-            "karmaConfig": "src/karma.conf.js",
+            "karmaConfig": "projects/ngx-tree-dnd/karma.conf.js",
             "styles": [
               "src/styles.css"
             ],