Comply with Golang semantic import versioning (#630)

* Code: compatible with semantic import versioning

* Tools & Docs: compatible with semantic import versioning

* Clean go.mod & go.sum

pkg/request/slave.go

@@ -4,10 +4,11 @@ import (
 	"bytes"
 	"encoding/json"
 	"errors"
-	"github.com/HFO4/cloudreve/pkg/auth"
-	"github.com/HFO4/cloudreve/pkg/conf"
-	"github.com/HFO4/cloudreve/pkg/serializer"
 	"time"
+
+	"github.com/cloudreve/Cloudreve/v3/pkg/auth"
+	"github.com/cloudreve/Cloudreve/v3/pkg/conf"
+	"github.com/cloudreve/Cloudreve/v3/pkg/serializer"
 )
 
 // RemoteCallback 发送远程存储策略上传回调请求