Update npm and node engines versions

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

package.json

@@ -67,8 +67,8 @@
 		"vue2-datepicker": "^3.6.3"
 	},
 	"engines": {
-		"node": ">=14.0.0",
-		"npm": ">=7.0.0"
+		"node": "^14.0.0",
+		"npm": "^7.0.0"
 	},
 	"devDependencies": {
 		"@nextcloud/babel-config": "^1.0.0",