Update all packages to latest (#53)

* Add prettier config

* Use Gutenberg nvm

* Update all packages

* Use default WP core in env

Author: getdave

.nvmrc

@@ -1 +1 @@
-12
+lts/*

.prettierrc.js

@@ -0,0 +1,3 @@
+// Import the default config file and expose it in the project root.
+// Useful for editor integrations.
+module.exports = require( '@wordpress/prettier-config' );

.wp-env.json

@@ -1,5 +1,4 @@
 {
-    "core": "WordPress/WordPress#master",
     "port": 7575,
     "testsPort": 7576,
 	"plugins": ["."]