chore(monorepos): lerna versioning shouldn't publish frontend/backend

Signed-off-by: Jonathan <theflametrooper@gmail.com>

backend/package.json

@@ -1,5 +1,6 @@
 {
   "name": "musare-backend",
+  "private": true,
   "version": "2.1.0",
   "description": "A modern, open-source, collaborative music app https://musare.com",
   "main": "app.js",

frontend/package.json

@@ -1,5 +1,6 @@
 {
   "name": "musare-frontend",
+  "private": true,
   "version": "2.1.0",
   "description": "A modern, open-source, collaborative music app https://musare.com",
   "main": "main.js",