⚡ Release 2.8.1 (#4771)

* unfuck release 2.8.0

* ⚡ Release 2.8.1

* Ensure we can install also on latest

package.json

@@ -1,6 +1,6 @@
 {
   "name": "parse-server",
-  "version": "2.8.0",
+  "version": "2.8.1",
   "description": "An express module providing a Parse-compatible API server",
   "main": "lib/index.js",
   "repository": {
@@ -14,6 +14,7 @@
     "views/",
     "LICENSE",
     "PATENTS",
+    "postinstall.js",
     "README.md"
   ],
   "license": "BSD-3-Clause",