docs: add nickmccurdy as a contributor (#332)

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

.all-contributorsrc

@@ -420,7 +420,9 @@
       "profile": "https://nickmccurdy.com/",
       "contributions": [
         "projectManagement",
-        "question"
+        "question",
+        "code",
+        "test"
       ]
     }
   ],

README.md

@@ -508,13 +508,12 @@ Thanks goes to these people ([emoji key][emojis]):
     <td align="center"><a href="https://github.com/nanivijay"><img src="https://avatars0.githubusercontent.com/u/5945591?v=4" width="100px;" alt=""/><br /><sub><b>Vijay Kumar Otti</b></sub></a><br /><a href="https://github.com/testing-library/user-event/issues?q=author%3Ananivijay" title="Bug reports">🐛</a></td>
     <td align="center"><a href="http://tompicton.com"><img src="https://avatars2.githubusercontent.com/u/12588098?v=4" width="100px;" alt=""/><br /><sub><b>Tom Picton</b></sub></a><br /><a href="https://github.com/testing-library/user-event/issues?q=author%3Atpict" title="Bug reports">🐛</a> <a href="https://github.com/testing-library/user-event/commits?author=tpict" title="Code">💻</a> <a href="https://github.com/testing-library/user-event/commits?author=tpict" title="Tests">⚠️</a></td>
     <td align="center"><a href="https://hung.dev"><img src="https://avatars3.githubusercontent.com/u/8603085?v=4" width="100px;" alt=""/><br /><sub><b>Hung Viet Nguyen</b></sub></a><br /><a href="https://github.com/testing-library/user-event/issues?q=author%3Anvh95" title="Bug reports">🐛</a></td>
-    <td align="center"><a href="https://nickmccurdy.com/"><img src="https://avatars0.githubusercontent.com/u/927220?v=4" width="100px;" alt=""/><br /><sub><b>Nick McCurdy</b></sub></a><br /><a href="#projectManagement-nickmccurdy" title="Project Management">📆</a> <a href="#question-nickmccurdy" title="Answering Questions">💬</a></td>
+    <td align="center"><a href="https://nickmccurdy.com/"><img src="https://avatars0.githubusercontent.com/u/927220?v=4" width="100px;" alt=""/><br /><sub><b>Nick McCurdy</b></sub></a><br /><a href="#projectManagement-nickmccurdy" title="Project Management">📆</a> <a href="#question-nickmccurdy" title="Answering Questions">💬</a> <a href="https://github.com/testing-library/user-event/commits?author=nickmccurdy" title="Code">💻</a> <a href="https://github.com/testing-library/user-event/commits?author=nickmccurdy" title="Tests">⚠️</a></td>
   </tr>
 </table>
 
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 This project follows the [all-contributors][all-contributors] specification.