Migrate to use jsoniter instead of encoding/json (#14841)

* Migrate to use jsoniter

* fix tests

* update gitea.com/go-chi/binding

Signed-off-by: Andrew Thornton <art27@cantab.net>
Co-authored-by: 6543 <6543@obermui.de>

modules/setting/setting.go

@@ -7,7 +7,6 @@ package setting
 
 import (
 	"encoding/base64"
-	"encoding/json"
 	"fmt"
 	"io"
 	"io/ioutil"
@@ -28,6 +27,7 @@ import (
 	"code.gitea.io/gitea/modules/user"
 	"code.gitea.io/gitea/modules/util"
 
+	jsoniter "github.com/json-iterator/go"
 	shellquote "github.com/kballard/go-shellquote"
 	"github.com/unknwon/com"
 	gossh "golang.org/x/crypto/ssh"
@@ -1111,6 +1111,7 @@ func MakeManifestData(appName string, appURL string, absoluteAssetURL string) []
 		Icons     []manifestIcon `json:"icons"`
 	}
 
+	json := jsoniter.ConfigCompatibleWithStandardLibrary
 	bytes, err := json.Marshal(&manifestJSON{
 		Name:      appName,
 		ShortName: appName,