Add Google Keep and Google Slides (#2466)

README.md

@@ -435,7 +435,9 @@ API | Description | Auth | HTTPS | CORS |
 | [Gitter](https://developer.gitter.im/docs/welcome) | Chat for Developers | `OAuth` | Yes | Unknown |
 | [Glitterly](https://developers.glitterly.app) | Image generation API | `apiKey` | Yes | Yes |
 | [Google Docs](https://developers.google.com/docs/api/reference/rest) | API to read, write, and format Google Docs documents | `OAuth` | Yes | Unknown |
+| [Google Keep](https://developers.google.com/keep/api/reference/rest) | API to read, write, and format Google Keep notes | `OAuth` | Yes | Unknown |
 | [Google Sheets](https://developers.google.com/sheets/api/reference/rest) | API to read, write, and format Google Sheets data | `OAuth` | Yes | Unknown |
+| [Google Slides](https://developers.google.com/slides/api/reference/rest) | API to read, write, and format Google Slides presentations | `OAuth` | Yes | Unknown |
 | [Gorest](https://gorest.co.in/) | Online REST API for Testing and Prototyping | `OAuth` | Yes | Unknown |
 | [host-t.com](https://host-t.com) | Basic DNS query via HTTP GET request | No | Yes | No |
 | [Host.io](https://host.io) | Domains Data API for Developers | `apiKey` | Yes | Yes |