Update vendor (github.com/mattermost)

vendor/github.com/mattermost/mattermost-server/model/channel_search.go

@@ -0,0 +1,26 @@
+// Copyright (c) 2016-present Mattermost, Inc. All Rights Reserved.
+// See License.txt for license information.
+
+package model
+
+import (
+	"encoding/json"
+	"io"
+)
+
+type ChannelSearch struct {
+	Term string `json:"term"`
+}
+
+// ToJson convert a Channel to a json string
+func (c *ChannelSearch) ToJson() string {
+	b, _ := json.Marshal(c)
+	return string(b)
+}
+
+// ChannelSearchFromJson will decode the input and return a Channel
+func ChannelSearchFromJson(data io.Reader) *ChannelSearch {
+	var cs *ChannelSearch
+	json.NewDecoder(data).Decode(&cs)
+	return cs
+}