[REL] v1.2.3

# v1.2.3

This is just another small bug fix release, because we need it in Odoo.

Fix: prevent crash when rendering a component before mounting it

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@odoo/owl",
-  "version": "1.2.2",
+  "version": "1.2.3",
   "description": "Odoo Web Library (OWL)",
   "main": "dist/owl.cjs.js",
   "browser": "dist/owl.iife.js",
@@ -44,7 +44,7 @@
     "github-api": "^3.3.0",
     "jest": "^23.6.0",
     "jest-environment-jsdom": "^24.7.1",
-    "live-server": "^1.2.2",
+    "live-server": "^1.2.3",
     "npm-run-all": "^4.1.5",
     "prettier": "^2.0.4",
     "rollup": "^1.6.0",