Bump version to 1.3.0

Author: wch

package.json

@@ -2,7 +2,7 @@
   "name": "shiny",
   "displayName": "Shiny",
   "description": "Run and develop Shiny apps in Python or R.",
-  "version": "1.2.2",
+  "version": "1.3.0",
   "publisher": "Posit",
   "icon": "images/logo.png",
   "repository": {