Upgrade go module and redis/v8

Author: LyricTian

.travis.yml

@@ -1,8 +1,7 @@
 language: go
-go_import_path: gopkg.in/go-oauth2/redis.v4
+go_import_path: github.com/go-oauth2/redis/v4
 matrix:
   include:
-    - go: "1.9.7"
     - go: 1.13.x
       env: GO111MODULE=on
 services:

README.md

@@ -5,7 +5,7 @@
 ## Install
 
 ``` bash
-$ go get -u -v gopkg.in/go-oauth2/redis.v4
+$ go get -u -v github.com/go-oauth2/redis/v4
 ```
 
 ## Usage
@@ -15,8 +15,8 @@ package main
 
 import (
 	"github.com/go-redis/redis"
-	oredis "gopkg.in/go-oauth2/redis.v4"
-	"gopkg.in/oauth2.v3/manage"
+	oredis "github.com/go-oauth2/redis/v4"
+	"github.com/go-oauth2/oauth2/v4/manage"
 )
 
 func main() {
@@ -46,9 +46,9 @@ Copyright (c) 2020 Lyric
 [Build-Status-Image]: https://travis-ci.org/go-oauth2/redis.svg?branch=master
 [codecov-url]: https://codecov.io/gh/go-oauth2/redis
 [codecov-image]: https://codecov.io/gh/go-oauth2/redis/branch/master/graph/badge.svg
-[reportcard-url]: https://goreportcard.com/report/gopkg.in/go-oauth2/redis.v4
-[reportcard-image]: https://goreportcard.com/badge/gopkg.in/go-oauth2/redis.v4
-[godoc-url]: https://godoc.org/gopkg.in/go-oauth2/redis.v4
-[godoc-image]: https://godoc.org/gopkg.in/go-oauth2/redis.v4?status.svg
+[reportcard-url]: https://goreportcard.com/report/github.com/go-oauth2/redis/v4
+[reportcard-image]: https://goreportcard.com/badge/github.com/go-oauth2/redis/v4
+[godoc-url]: https://godoc.org/github.com/go-oauth2/redis/v4
+[godoc-image]: https://godoc.org/github.com/go-oauth2/redis/v4?status.svg
 [license-url]: http://opensource.org/licenses/MIT
 [license-image]: https://img.shields.io/npm/l/express.svg

go.mod

@@ -1,12 +1,13 @@
-module gopkg.in/go-oauth2/redis.v4
+module github.com/go-oauth2/redis/v4
 
 go 1.13
 
 require (
-	github.com/go-redis/redis v6.15.8+incompatible
-	github.com/json-iterator/go v1.1.9
+	github.com/go-oauth2/oauth2/v4 v4.1.0
+	github.com/go-redis/redis/v8 v8.0.0-beta.5
+	github.com/google/uuid v1.1.1
+	github.com/json-iterator/go v1.1.10
 	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
 	github.com/modern-go/reflect2 v1.0.1 // indirect
 	github.com/smartystreets/goconvey v1.6.4
-	gopkg.in/oauth2.v4 v4.0.0
 )