docs: add tobiasbueschel as a contributor for code, and test (#469)

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

Author: allcontributors[bot]

.all-contributorsrc

@@ -246,6 +246,16 @@
       "contributions": [
         "code"
       ]
+    },
+    {
+      "login": "tobiasbueschel",
+      "name": "Tobias Büschel",
+      "avatar_url": "https://avatars.githubusercontent.com/u/13087421?v=4",
+      "profile": "http://linkedin.com/in/tbueschel",
+      "contributions": [
+        "code",
+        "test"
+      ]
     }
   ],
   "contributorsPerLine": 7,

README.md

@@ -92,6 +92,7 @@ Thanks goes to these wonderful people ([emoji key](https://github.com/all-contri
       <td align="center" valign="top" width="14.28%"><a href="http://www.codingale.dev"><img src="https://avatars.githubusercontent.com/u/12262852?v=4?s=100" width="100px;" alt="Alejandro Ulate"/><br /><sub><b>Alejandro Ulate</b></sub></a><br /><a href="https://github.com/all-contributors/app/issues?q=author%3ACodingAleCR" title="Bug reports">🐛</a></td>
       <td align="center" valign="top" width="14.28%"><a href="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/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/app/commits?author=KnorpelSenf" title="Code">💻</a></td>
       <td align="center" valign="top" width="14.28%"><a href="https://chjh.nl"><img src="https://avatars.githubusercontent.com/u/2946344?v=4?s=100" width="100px;" alt="Chris Hartgerink"/><br /><sub><b>Chris Hartgerink</b></sub></a><br /><a href="https://github.com/all-contributors/app/commits?author=chartgerink" title="Code">💻</a></td>
+      <td align="center" valign="top" width="14.28%"><a href="http://linkedin.com/in/tbueschel"><img src="https://avatars.githubusercontent.com/u/13087421?v=4?s=100" width="100px;" alt="Tobias Büschel"/><br /><sub><b>Tobias Büschel</b></sub></a><br /><a href="https://github.com/all-contributors/app/commits?author=tobiasbueschel" title="Code">💻</a> <a href="https://github.com/all-contributors/app/commits?author=tobiasbueschel" title="Tests">⚠️</a></td>
     </tr>
   </tbody>
   <tfoot>