update jetpack autoloader to 2.7.1 (#3683)

Co-authored-by: Seghir Nadir <[email protected]>

Author: Aljullu

composer.json

@@ -13,7 +13,7 @@
 	"minimum-stability": "dev",
 	"require": {
 		"composer/installers": "^1.7.0",
-		"automattic/jetpack-autoloader": "^2.0.0"
+		"automattic/jetpack-autoloader": "2.7.1"
 	},
 	"require-dev": {
 		"phpunit/phpunit": "6.5.14",