add missing lodash

Author: icebob

template/mixins/db.mixin.js

@@ -1,6 +1,7 @@
 "use strict";
 
 const { Service: DbService } = require("@moleculer/database");
+const _ = require("lodash");
 
 /**
  * @typedef {import('moleculer').ServiceSchema} ServiceSchema Moleculer's Service Schema

template/package.json

@@ -80,6 +80,7 @@
     {{#apiIO}}
     "moleculer-io": "^2.2.0",
     {{/apiIO}}
+    "lodash": "^4.17.21",
     "moleculer": "^0.15.0-beta1"
   },
   {{#apiGQL}}