docs: add kandros as a contributor (#139)

* docs: update README.md

* docs: update .all-contributorsrc

Author: allcontributors[bot]

.all-contributorsrc

@@ -286,6 +286,16 @@
       "contributions": [
         "doc"
       ]
+    },
+    {
+      "login": "kandros",
+      "name": "Jaga Santagostino",
+      "avatar_url": "https://avatars0.githubusercontent.com/u/4562878?v=4",
+      "profile": "http://jagascript.com",
+      "contributions": [
+        "bug",
+        "test"
+      ]
     }
   ],
   "repoHost": "https://github.com",

README.md

@@ -1073,6 +1073,9 @@ Thanks goes to these people ([emoji key][emojis]):
     <td align="center"><a href="https://github.com/jeanchung"><img src="https://avatars0.githubusercontent.com/u/10778036?v=4" width="100px;" alt="Jean Chung"/><br /><sub><b>Jean Chung</b></sub></a><br /><a href="https://github.com/testing-library/jest-dom/commits?author=jeanchung" title="Code">💻</a> <a href="https://github.com/testing-library/jest-dom/commits?author=jeanchung" title="Tests">⚠️</a></td>
     <td align="center"><a href="https://github.com/YardenShoham"><img src="https://avatars3.githubusercontent.com/u/20454870?v=4" width="100px;" alt="Yarden Shoham"/><br /><sub><b>Yarden Shoham</b></sub></a><br /><a href="https://github.com/testing-library/jest-dom/commits?author=YardenShoham" title="Documentation">📖</a></td>
   </tr>
+  <tr>
+    <td align="center"><a href="http://jagascript.com"><img src="https://avatars0.githubusercontent.com/u/4562878?v=4" width="100px;" alt="Jaga Santagostino"/><br /><sub><b>Jaga Santagostino</b></sub></a><br /><a href="https://github.com/testing-library/jest-dom/issues?q=author%3Akandros" title="Bug reports">🐛</a> <a href="https://github.com/testing-library/jest-dom/commits?author=kandros" title="Tests">⚠️</a></td>
+  </tr>
 </table>
 
 <!-- ALL-CONTRIBUTORS-LIST:END -->