upgrade levelqueue to 0.1.0 (#9192) (#9199)

vendor/gitea.com/lunny/levelqueue/README.md

@@ -0,0 +1,28 @@
+# levelqueue
+
+Level queue is a simple queue golang library base on go-leveldb.
+
+[![Build Status](https://drone.gitea.com/api/badges/lunny/levelqueue/status.svg)](https://drone.gitea.com/lunny/levelqueue)  [![](http://gocover.io/_badge/gitea.com/lunny/levelqueue)](http://gocover.io/gitea.com/lunny/levelqueue)
+[![](https://goreportcard.com/badge/gitea.com/lunny/levelqueue)](https://goreportcard.com/report/gitea.com/lunny/levelqueue)
+
+## Installation
+
+```
+go get gitea.com/lunny/levelqueue
+```
+
+## Usage
+
+```Go
+queue, err := levelqueue.Open("./queue")
+
+err = queue.RPush([]byte("test"))
+
+// pop an element from left of the queue
+data, err = queue.LPop()
+
+// if handle success, element will be pop, otherwise it will be keep
+queue.LHandle(func(dt []byte) error{
+    return nil
+})
+```