[mod]: Bump gopkg.in/src-d/go-git.v4 from 4.8.0 to 4.10.0 (#6662)

Bumps [gopkg.in/src-d/go-git.v4](https://github.com/src-d/go-git) from 4.8.0 to 4.10.0.
- [Release notes](https://github.com/src-d/go-git/releases)
- [Commits](https://github.com/src-d/go-git/compare/v4.8.0...v4.10.0)

vendor/gopkg.in/src-d/go-git.v4/utils/merkletrie/noder/path.go

@@ -3,8 +3,6 @@ package noder
 import (
 	"bytes"
 	"strings"
-
-	"golang.org/x/text/unicode/norm"
 )
 
 // Path values represent a noder and its ancestors.  The root goes first
@@ -80,11 +78,9 @@ func (p Path) Compare(other Path) int {
 		case i == len(p):
 			return -1
 		default:
-			form := norm.Form(norm.NFC)
-			this := form.String(p[i].Name())
-			that := form.String(other[i].Name())
-
-			cmp := strings.Compare(this, that)
+			// We do *not* normalize Unicode here. CGit doesn't.
+			// https://github.com/src-d/go-git/issues/1057
+			cmp := strings.Compare(p[i].Name(), other[i].Name())
 			if cmp != 0 {
 				return cmp
 			}