Update npm and node engines versions

Signed-off-by: Nextcloud bot <bot@nextcloud.com>

package.json

@@ -1,20 +1,24 @@
 {
-  "name": "@nextcloud/browserslist-config",
-  "version": "2.2.0",
-  "description": "Shared browserslist for Nextcloud libraries and apps",
-  "main": "browserlist.config.js",
-  "scripts": {
-    "test": "echo \"Error: no test specified\" && exit 1"
-  },
-  "keywords": [
-    "nextcloud",
-    "browserslist"
-  ],
-  "homepage": "https://github.com/nextcloud/browserslist-config#readme",
-  "author": "Christoph Wurst",
-  "license": "GPL-3.0-or-later",
-  "repository": {
-    "type": "git",
-    "url": "https://github.com/nextcloud/browserslist-config"
-  }
+	"name": "@nextcloud/browserslist-config",
+	"version": "2.2.0",
+	"description": "Shared browserslist for Nextcloud libraries and apps",
+	"main": "browserlist.config.js",
+	"scripts": {
+		"test": "echo \"Error: no test specified\" && exit 1"
+	},
+	"keywords": [
+		"nextcloud",
+		"browserslist"
+	],
+	"homepage": "https://github.com/nextcloud/browserslist-config#readme",
+	"author": "Christoph Wurst",
+	"license": "GPL-3.0-or-later",
+	"repository": {
+		"type": "git",
+		"url": "https://github.com/nextcloud/browserslist-config"
+	},
+	"engines": {
+		"node": "^14.0.0",
+		"npm": "^7.0.0"
+	}
 }