Fix import path of go-sdk (#141)

From code.gitea.io/go-sdk/gitea
  To code.gitea.io/sdk/gitea

vendor/code.gitea.io/sdk/gitea/issue_milestone.go

@@ -0,0 +1,69 @@
+// Copyright 2016 The Gogs Authors. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
+package gitea
+
+import (
+	"bytes"
+	"encoding/json"
+	"fmt"
+	"time"
+)
+
+type Milestone struct {
+	ID           int64      `json:"id"`
+	Title        string     `json:"title"`
+	Description  string     `json:"description"`
+	State        StateType  `json:"state"`
+	OpenIssues   int        `json:"open_issues"`
+	ClosedIssues int        `json:"closed_issues"`
+	Closed       *time.Time `json:"closed_at"`
+	Deadline     *time.Time `json:"due_on"`
+}
+
+func (c *Client) ListRepoMilestones(owner, repo string) ([]*Milestone, error) {
+	milestones := make([]*Milestone, 0, 10)
+	return milestones, c.getParsedResponse("GET", fmt.Sprintf("/repos/%s/%s/milestones", owner, repo), nil, nil, &milestones)
+}
+
+func (c *Client) GetMilestone(owner, repo string, id int64) (*Milestone, error) {
+	milestone := new(Milestone)
+	return milestone, c.getParsedResponse("GET", fmt.Sprintf("/repos/%s/%s/milestones/%d", owner, repo, id), nil, nil, milestone)
+}
+
+type CreateMilestoneOption struct {
+	Title       string     `json:"title"`
+	Description string     `json:"description"`
+	Deadline    *time.Time `json:"due_on"`
+}
+
+func (c *Client) CreateMilestone(owner, repo string, opt CreateMilestoneOption) (*Milestone, error) {
+	body, err := json.Marshal(&opt)
+	if err != nil {
+		return nil, err
+	}
+	milestone := new(Milestone)
+	return milestone, c.getParsedResponse("POST", fmt.Sprintf("/repos/%s/%s/milestones", owner, repo), jsonHeader, bytes.NewReader(body), milestone)
+}
+
+type EditMilestoneOption struct {
+	Title       string     `json:"title"`
+	Description *string    `json:"description"`
+	State       *string    `json:"state"`
+	Deadline    *time.Time `json:"due_on"`
+}
+
+func (c *Client) EditMilestone(owner, repo string, id int64, opt EditMilestoneOption) (*Milestone, error) {
+	body, err := json.Marshal(&opt)
+	if err != nil {
+		return nil, err
+	}
+	milestone := new(Milestone)
+	return milestone, c.getParsedResponse("PATCH", fmt.Sprintf("/repos/%s/%s/milestones/%d", owner, repo, id), jsonHeader, bytes.NewReader(body), milestone)
+}
+
+func (c *Client) DeleteMilestone(owner, repo string, id int64) error {
+	_, err := c.getResponse("DELETE", fmt.Sprintf("/repos/%s/%s/milestones/%d", owner, repo, id), nil, nil)
+	return err
+}