chore: update version to 0.0.21 and add snippet property to README

Author: Ma11hewThomas

README.md

@@ -158,6 +158,7 @@ The test object in the report includes the following [CTRF properties](https://c
 | `suite`       | String           | Optional | The suite or group to which the test belongs.                                       |
 | `message`     | String           | Optional | The failure message if the test failed.                                             |
 | `trace`       | String           | Optional | The stack trace captured if the test failed.                                        |
+| `snippet`     | String           | Optional | The code snippet that was executed during the test if the test failed.              |
 | `rawStatus`   | String           | Optional | The original playwright status of the test before mapping to CTRF status.           |
 | `tags`        | Array of Strings | Optional | The tags retrieved from the test name                                               |
 | `type`        | String           | Optional | The type of test (e.g., `api`, `e2e`).                                              |
@@ -169,7 +170,6 @@ The test object in the report includes the following [CTRF properties](https://c
 | `stdout`      | Array of Strings | Optional | The standard output of the test.                                                    |
 | `stderr`      | Array of Strings | Optional | The standard error of the test.                                                     |
 | `screenshot`  | String           | Optional | A base64 encoded screenshot taken during the test.                                  |
-| `screenshot`  | String           | Optional | A base64 encoded screenshot taken during the test.                                  |
 | `steps`       | Array of Objects | Optional | Individual steps in the test, especially for BDD-style testing.                     |
 
 ## Advanced usage

package-lock.json

@@ -1,6 +1,6 @@
 {
   "name": "playwright-ctrf-json-reporter",
-  "version": "0.0.20",
+  "version": "0.0.21",
   "description": "A Playwright JSON test reporter to create test results reports",
   "main": "dist/index.js",
   "scripts": {