Update version and add minRackVersion.

Author: dbgrande

plugin.json

@@ -1,7 +1,7 @@
 {
   "slug": "GrandeModular",
   "name": "Grande",
-  "version": "2.7.2",
+  "version": "2.8.0",
   "license": "GPL-3.0-or-later",
   "author": "David Grande",
   "authorEmail": "dbgrande246@gmail.com",
@@ -11,6 +11,7 @@
   "sourceUrl": "https://github.com/dbgrande/GrandeModular",
   "donateUrl": "",
   "changelogUrl": "",
+  "minRackVersion": "2.4.0",
   "modules": [
     {
       "slug": "Clip",