added dev dependencies, build command

package.json

@@ -4,7 +4,8 @@
   "version": "3.6.0",
   "description": "Zabbix plugin for Grafana",
   "scripts": {
-    "test": "echo \"Error: no test specified\" && exit 1"
+    "test": "echo \"Error: no test specified\" && exit 1",
+    "build": "./node_modules/.bin/grunt"
   },
   "repository": {
     "type": "git",
@@ -42,7 +43,8 @@
     "moment": "~2.14.1",
     "prunk": "~1.2.1",
     "q": "~1.4.1",
-    "sinon-chai": "~2.8.0"
+    "sinon-chai": "~2.13.0",
+    "sinon":"^3.2.1"
   },
   "dependencies": {
     "lodash": "~4.0.0"