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>

services/gitdiff/gitdiff_test.go

@@ -6,7 +6,6 @@
 package gitdiff
 
 import (
-	"encoding/json"
 	"fmt"
 	"html/template"
 	"strconv"
@@ -17,6 +16,7 @@ import (
 	"code.gitea.io/gitea/modules/git"
 	"code.gitea.io/gitea/modules/highlight"
 	"code.gitea.io/gitea/modules/setting"
+	jsoniter "github.com/json-iterator/go"
 	dmp "github.com/sergi/go-diff/diffmatchpatch"
 	"github.com/stretchr/testify/assert"
 	"gopkg.in/ini.v1"
@@ -298,7 +298,8 @@ index 6961180..9ba1a00 100644
 				t.Errorf("ParsePatch(%q) error = %v, wantErr %v", testcase.name, err, testcase.wantErr)
 				return
 			}
-			gotMarshaled, _ := json.MarshalIndent(got, "  ", "  ")
+			json := jsoniter.ConfigCompatibleWithStandardLibrary
+			gotMarshaled, _ := json.MarshalIndent(got, "", "  ")
 			if got.NumFiles != 1 {
 				t.Errorf("ParsePath(%q) did not receive 1 file:\n%s", testcase.name, string(gotMarshaled))
 				return