docs: add mhedges as a contributor (#252)

* docs: update README.md [skip ci]

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

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

.all-contributorsrc

@@ -159,6 +159,19 @@
         "test",
         "talk"
       ]
+    },
+    {
+      "login": "mhedges",
+      "name": "Michael Hedges",
+      "avatar_url": "https://avatars3.githubusercontent.com/u/18672512?v=4",
+      "profile": "https://github.com/mhedges",
+      "contributions": [
+        "code",
+        "ideas",
+        "question",
+        "test",
+        "talk"
+      ]
     }
   ],
   "contributorsPerLine": 7,

README.md

@@ -136,6 +136,7 @@ Thanks especially to the gracious help of awkward-array contributors ([emoji key
     <td align="center"><a href="https://github.com/glass-ships"><img src="https://avatars2.githubusercontent.com/u/26975530?v=4" width="100px;" alt=""/><br /><sub><b>glass-ships</b></sub></a><br /><a href="https://github.com/scikit-hep/awkward-1.0/commits?author=glass-ships" title="Code">💻</a> <a href="#ideas-glass-ships" title="Ideas, Planning, & Feedback">🤔</a> <a href="https://github.com/scikit-hep/awkward-1.0/commits?author=glass-ships" title="Tests">⚠️</a> <a href="#talk-glass-ships" title="Talks">📢</a></td>
     <td align="center"><a href="https://www.linkedin.com/in/charles-c-escott/"><img src="https://avatars3.githubusercontent.com/u/48469669?v=4" width="100px;" alt=""/><br /><sub><b>Charles Escott</b></sub></a><br /><a href="https://github.com/scikit-hep/awkward-1.0/commits?author=EscottC" title="Code">💻</a> <a href="#ideas-EscottC" title="Ideas, Planning, & Feedback">🤔</a> <a href="https://github.com/scikit-hep/awkward-1.0/commits?author=EscottC" title="Tests">⚠️</a> <a href="#talk-EscottC" title="Talks">📢</a></td>
     <td align="center"><a href="https://github.com/masonproffitt"><img src="https://avatars3.githubusercontent.com/u/32773304?v=4" width="100px;" alt=""/><br /><sub><b>Mason Proffitt</b></sub></a><br /><a href="https://github.com/scikit-hep/awkward-1.0/issues?q=author%3Amasonproffitt" title="Bug reports">🐛</a> <a href="https://github.com/scikit-hep/awkward-1.0/commits?author=masonproffitt" title="Code">💻</a> <a href="#ideas-masonproffitt" title="Ideas, Planning, & Feedback">🤔</a> <a href="https://github.com/scikit-hep/awkward-1.0/commits?author=masonproffitt" title="Tests">⚠️</a> <a href="#talk-masonproffitt" title="Talks">📢</a></td>
+    <td align="center"><a href="https://github.com/mhedges"><img src="https://avatars3.githubusercontent.com/u/18672512?v=4" width="100px;" alt=""/><br /><sub><b>Michael Hedges</b></sub></a><br /><a href="https://github.com/scikit-hep/awkward-1.0/commits?author=mhedges" title="Code">💻</a> <a href="#ideas-mhedges" title="Ideas, Planning, & Feedback">🤔</a> <a href="#question-mhedges" title="Answering Questions">💬</a> <a href="https://github.com/scikit-hep/awkward-1.0/commits?author=mhedges" title="Tests">⚠️</a> <a href="#talk-mhedges" title="Talks">📢</a></td>
   </tr>
 </table>