Update wp-env to correct database credentials (#216)

Upgrading `wp-env` to latest version fixes issues related to newer WordPress docker images using different credentials. 

For more information see WordPress/gutenberg#29752

package.json

@@ -6,15 +6,17 @@
 	"license": "GPL-2.0-or-later",
 	"private": true,
 	"dependencies": {
-		"@wordpress/env": "^3.0.0"
+		"@wordpress/env": "^4.0.0"
 	},
 	"workspaces": {
 		"packages": [
 			"wp-content/mu-plugins/pub/locale-switcher",
 			"wp-content/plugins/wporg-learn",
 			"wp-content/themes/pub/wporg-learn-2020"
 		],
-		"nohoist": ["**/grunt-*"]
+		"nohoist": [
+			"**/grunt-*"
+		]
 	},
 	"scripts": {
 		"install:env": "./bin/index.sh",