Update package.json

package.json

 {
 	"id": "uni-im",
 	"displayName": "uni-im",
-	"version": "3.0.2",
+	"version": "3.0.3",
 	"description": "uni-im是云端一体的、全平台的、免费的、开源即时通讯系统",
 	"keywords": [
         "im,即时通讯,客服,聊天"