Update project version to 0.2.0, improve JSON placeholder

package.json

@@ -1,6 +1,6 @@
 {
   "name": "rdap",
-  "version": "0.1.0",
+  "version": "0.2.0",
   "private": true,
   "scripts": {
     "build": "next build",

src/constants.ts

@@ -87,6 +87,6 @@ export const placeholders: Record<SimplifiedTargetType | "auto", string> = {
   url: "https://rdap.org/domain/example.com",
   tld: ".dev",
   registrar: "9999",
-  json: "{ (paste JSON) }",
+  json: `{"objectClassName":"domain", ... }`,
   domain: "example.com",
 };