docs: add silviuaavram as a contributor for code, and test (#638)

* docs: update README.md

* docs: update .all-contributorsrc

---------

Co-authored-by: allcontributors[bot] <46447321+allcontributors[bot]@users.noreply.github.com>

.all-contributorsrc

@@ -813,6 +813,16 @@
  "contributions": [
  "doc"
  ]
+ },
+ {
+ "login": "silviuaavram",
+ "name": "Silviu Alexandru Avram",
+ "avatar_url": "https://avatars.githubusercontent.com/u/11275392?v=4",
+ "profile": "https://silviuaavram.com",
+ "contributions": [
+ "code",
+ "test"
+ ]
  }
  ],
  "repoHost": "https://github.com",

README.md

@@ -1570,6 +1570,7 @@ Thanks goes to these people ([emoji key][emojis]):
   <td align="center" valign="top" width="14.28%"><a href="http://www.waynevanson.com"><img src="https://avatars.githubusercontent.com/u/29592214?v=4?s=100" width="100px;" alt="Wayne Van Son"/><br /><sub><b>Wayne Van Son</b></sub></a><br /><a href="https://github.com/testing-library/jest-dom/commits?author=waynevanson" title="Code">💻</a> <a href="https://github.com/testing-library/jest-dom/commits?author=waynevanson" title="Tests">⚠️</a></td>
   <td align="center" valign="top" width="14.28%"><a href="https://github.com/idanen"><img src="https://avatars.githubusercontent.com/u/1687893?v=4?s=100" width="100px;" alt="Idan Entin"/><br /><sub><b>Idan Entin</b></sub></a><br /><a href="https://github.com/testing-library/jest-dom/commits?author=idanen" title="Code">💻</a> <a href="https://github.com/testing-library/jest-dom/commits?author=idanen" title="Tests">⚠️</a></td>
   <td align="center" valign="top" width="14.28%"><a href="https://github.com/mibcadet"><img src="https://avatars.githubusercontent.com/u/925500?v=4?s=100" width="100px;" alt="mibcadet"/><br /><sub><b>mibcadet</b></sub></a><br /><a href="https://github.com/testing-library/jest-dom/commits?author=mibcadet" title="Documentation">📖</a></td>
+  <td align="center" valign="top" width="14.28%"><a href="https://silviuaavram.com"><img src="https://avatars.githubusercontent.com/u/11275392?v=4?s=100" width="100px;" alt="Silviu Alexandru Avram"/><br /><sub><b>Silviu Alexandru Avram</b></sub></a><br /><a href="https://github.com/testing-library/jest-dom/commits?author=silviuaavram" title="Code">💻</a> <a href="https://github.com/testing-library/jest-dom/commits?author=silviuaavram" title="Tests">⚠️</a></td>
  </tr>
  </tbody>
 </table>