docs: add dwmkerr as a contributor for bug, test, and code (#353)

* docs: update README.md [skip ci]

* docs: update .all-contributorsrc [skip ci]

---------

Co-authored-by: allcontributors[bot] <46447321+allcontributors[bot]@users.noreply.github.com>
Co-authored-by: Gregor Martynus <39992+gr2m@users.noreply.github.com>

Author: allcontributors[bot]

.all-contributorsrc

@@ -635,6 +635,17 @@
       "contributions": [
         "code"
       ]
+    },
+    {
+      "login": "dwmkerr",
+      "name": "Dave Kerr",
+      "avatar_url": "https://avatars.githubusercontent.com/u/1926984?v=4",
+      "profile": "http://www.dwmkerr.com",
+      "contributions": [
+        "bug",
+        "test",
+        "code"
+      ]
     }
   ],
   "skipCi": true

README.md

@@ -169,6 +169,7 @@ Thanks goes to these wonderful people
       <td align="center" valign="top" width="16.66%"><a href="https://www.lieret.net"><img src="https://avatars.githubusercontent.com/u/13602468?v=4?s=100" width="100px;" alt="Kilian Lieret"/><br /><sub><b>Kilian Lieret</b></sub></a><br /><a href="https://github.com/all-contributors/cli/issues?q=author%3Aklieret" title="Bug reports">🐛</a></td>
       <td align="center" valign="top" width="16.66%"><a href="https://github.com/KnorpelSenf"><img src="https://avatars.githubusercontent.com/u/12952387?v=4?s=100" width="100px;" alt="KnorpelSenf"/><br /><sub><b>KnorpelSenf</b></sub></a><br /><a href="https://github.com/all-contributors/cli/issues?q=author%3AKnorpelSenf" title="Bug reports">🐛</a></td>
       <td align="center" valign="top" width="16.66%"><a href="https://rea9lizer.carrd.co"><img src="https://avatars.githubusercontent.com/u/68494132?v=4?s=100" width="100px;" alt="QriLa &#124; Hyeon Gu"/><br /><sub><b>QriLa &#124; Hyeon Gu</b></sub></a><br /><a href="https://github.com/all-contributors/cli/commits?author=qyurila" title="Code">💻</a></td>
+      <td align="center" valign="top" width="16.66%"><a href="http://www.dwmkerr.com"><img src="https://avatars.githubusercontent.com/u/1926984?v=4?s=100" width="100px;" alt="Dave Kerr"/><br /><sub><b>Dave Kerr</b></sub></a><br /><a href="https://github.com/all-contributors/cli/issues?q=author%3Adwmkerr" title="Bug reports">🐛</a> <a href="https://github.com/all-contributors/cli/commits?author=dwmkerr" title="Tests">⚠️</a> <a href="https://github.com/all-contributors/cli/commits?author=dwmkerr" title="Code">💻</a></td>
     </tr>
   </tbody>
   <tfoot>