docs: add Tismas as a contributor (#778)

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

Author: allcontributors[bot]

.all-contributorsrc

@@ -1242,6 +1242,16 @@
  "contributions": [
  "code"
  ]
+ },
+ {
+ "login": "Tismas",
+ "name": "Adam",
+ "avatar_url": "https://avatars2.githubusercontent.com/u/13601275?v=4",
+ "profile": "https://github.com/Tismas",
+ "contributions": [
+ "code",
+ "test"
+ ]
  }
  ],
  "repoHost": "https://github.com"

README.md

@@ -294,6 +294,9 @@ Thanks goes to these people ([emoji key][emojis]):
  <td align="center"><a href="https://github.com/slowselfip"><img src="https://avatars3.githubusercontent.com/u/9762906?v=4" width="100px;" alt=""/><br /><sub><b>slowselfip</b></sub></a><br /><a href="https://github.com/testing-library/dom-testing-library/issues?q=author%3Aslowselfip" title="Bug reports">🐛</a></td>
  <td align="center"><a href="https://github.com/Semigradsky"><img src="https://avatars3.githubusercontent.com/u/1198848?v=4" width="100px;" alt=""/><br /><sub><b>Dmitry Semigradsky</b></sub></a><br /><a href="https://github.com/testing-library/dom-testing-library/commits?author=Semigradsky" title="Code">💻</a></td>
  </tr>
+ <tr>
+ <td align="center"><a href="https://github.com/Tismas"><img src="https://avatars2.githubusercontent.com/u/13601275?v=4" width="100px;" alt=""/><br /><sub><b>Adam</b></sub></a><br /><a href="https://github.com/testing-library/dom-testing-library/commits?author=Tismas" title="Code">💻</a> <a href="https://github.com/testing-library/dom-testing-library/commits?author=Tismas" title="Tests">⚠️</a></td>
+ </tr>
 </table>
 
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