chore: upgrade go version and deps

Author: kevwan

go.mod

@@ -1,10 +1,10 @@
 module github.com/zeromicro/go-queue
 
-go 1.15
+go 1.16
 
 require (
-	github.com/beanstalkd/go-beanstalk v0.1.0
-	github.com/segmentio/kafka-go v0.4.35
+	github.com/beanstalkd/go-beanstalk v0.2.0
+	github.com/segmentio/kafka-go v0.4.38
 	github.com/streadway/amqp v1.0.0
-	github.com/zeromicro/go-zero v1.4.1
+	github.com/zeromicro/go-zero v1.4.3
 )