Vendor Update (#16121)

* update github.com/PuerkitoBio/goquery

* update github.com/alecthomas/chroma

* update github.com/blevesearch/bleve/v2

* update github.com/caddyserver/certmagic

* update github.com/go-enry/go-enry/v2

* update github.com/go-git/go-billy/v5

* update github.com/go-git/go-git/v5

* update github.com/go-redis/redis/v8

* update github.com/go-testfixtures/testfixtures/v3

* update github.com/jaytaylor/html2text

* update github.com/json-iterator/go

* update github.com/klauspost/compress

* update github.com/markbates/goth

* update github.com/mattn/go-isatty

* update github.com/mholt/archiver/v3

* update github.com/microcosm-cc/bluemonday

* update github.com/minio/minio-go/v7

* update github.com/prometheus/client_golang

* update github.com/unrolled/render

* update github.com/xanzy/go-gitlab

* update github.com/yuin/goldmark

* update github.com/yuin/goldmark-highlighting

Co-authored-by: techknowlogick <techknowlogick@gitea.io>

vendor/golang.org/x/oauth2/authhandler/authhandler.go

@@ -0,0 +1,56 @@
+// Copyright 2021 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Package authhandler implements a TokenSource to support
+// "three-legged OAuth 2.0" via a custom AuthorizationHandler.
+package authhandler
+
+import (
+	"context"
+	"errors"
+
+	"golang.org/x/oauth2"
+)
+
+// AuthorizationHandler is a 3-legged-OAuth helper that prompts
+// the user for OAuth consent at the specified auth code URL
+// and returns an auth code and state upon approval.
+type AuthorizationHandler func(authCodeURL string) (code string, state string, err error)
+
+// TokenSource returns an oauth2.TokenSource that fetches access tokens
+// using 3-legged-OAuth flow.
+//
+// The provided context.Context is used for oauth2 Exchange operation.
+//
+// The provided oauth2.Config should be a full configuration containing AuthURL,
+// TokenURL, and Scope.
+//
+// An environment-specific AuthorizationHandler is used to obtain user consent.
+//
+// Per the OAuth protocol, a unique "state" string should be specified here.
+// This token source will verify that the "state" is identical in the request
+// and response before exchanging the auth code for OAuth token to prevent CSRF
+// attacks.
+func TokenSource(ctx context.Context, config *oauth2.Config, state string, authHandler AuthorizationHandler) oauth2.TokenSource {
+	return oauth2.ReuseTokenSource(nil, authHandlerSource{config: config, ctx: ctx, authHandler: authHandler, state: state})
+}
+
+type authHandlerSource struct {
+	ctx         context.Context
+	config      *oauth2.Config
+	authHandler AuthorizationHandler
+	state       string
+}
+
+func (source authHandlerSource) Token() (*oauth2.Token, error) {
+	url := source.config.AuthCodeURL(source.state)
+	code, state, err := source.authHandler(url)
+	if err != nil {
+		return nil, err
+	}
+	if state != source.state {
+		return nil, errors.New("state mismatch in 3-legged-OAuth flow")
+	}
+	return source.config.Exchange(source.ctx, code)
+}