fix(docs): remove NodeJS 10 and add callout for conditional exports (#2675)

Author: wolfy1339

README.md

@@ -77,7 +77,7 @@ import { Octokit, App } from "https://esm.sh/octokit?dts";
 
 </td></tr>
 <tr><th>
-Node 12+
+Node
 </th><td>
 
 Install with <code>npm/pnpm install octokit</code>, or <code>yarn add octokit</code>
@@ -86,21 +86,16 @@ Install with <code>npm/pnpm install octokit</code>, or <code>yarn add octokit</c
 import { Octokit, App } from "octokit";
 ```
 
-</td></tr>
-<tr><th>
-Node 10 and below
-</th><td>
-
-Install with <code>npm/pnpm install octokit</code>, or <code>yarn add octokit</code>
-
-```js
-const { Octokit, App } = require("octokit");
-```
-
 </td></tr>
 </tbody>
 </table>
 
+> [!IMPORTANT]
+> As we use [conditional exports](https://nodejs.org/api/packages.html#conditional-exports), you will need to adapt your `tsconfig.json` by setting `"moduleResolution": "node16", "module": "node16"`.
+>
+> See the TypeScript docs on [package.json "exports"](https://www.typescriptlang.org/docs/handbook/modules/reference.html#packagejson-exports).<br>
+> See this [helpful guide on transitioning to ESM](https://gist.github.com/sindresorhus/a39789f98801d908bbc7ff3ecc99d99c) from [@sindresorhus](https://github.com/sindresorhus)
+
 ## `Octokit` API Client
 
 **standalone minimal Octokit**: [`@octokit/core`](https://github.com/octokit/core.js/#readme).