docs: add dgleich as a contributor for code (#541)

* 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

@@ -268,6 +268,15 @@
       "contributions": [
         "bug"
       ]
+    },
+    {
+      "login": "dgleich",
+      "name": "David Gleich",
+      "avatar_url": "https://avatars.githubusercontent.com/u/33995?v=4",
+      "profile": "https://www.cs.purdue.edu/homes/dgleich",
+      "contributions": [
+        "code"
+      ]
     }
   ],
   "contributorsPerLine": 7,

README.md

@@ -5,7 +5,7 @@
 ![PyPI - Python Version](https://img.shields.io/pypi/pyversions/osxphotos)
 [![Downloads](https://static.pepy.tech/personalized-badge/osxphotos?period=month&units=international_system&left_color=black&right_color=brightgreen&left_text=downloads/month)](https://pepy.tech/project/osxphotos)
 <!-- ALL-CONTRIBUTORS-BADGE:START - Do not remove or modify this section -->
-[![All Contributors](https://img.shields.io/badge/all_contributors-28-orange.svg?style=flat)](#contributors)
+[![All Contributors](https://img.shields.io/badge/all_contributors-29-orange.svg?style=flat)](#contributors)
 <!-- ALL-CONTRIBUTORS-BADGE:END -->
 
 OSXPhotos provides the ability to interact with and query Apple's Photos.app library on macOS. You can query the Photos library database — for example, file name, file path, and metadata such as keywords/tags, persons/faces, albums, etc. You can also easily export both the original and edited photos.
@@ -3801,6 +3801,9 @@ Thanks goes to these wonderful people ([emoji key](https://allcontributors.org/d
     <td align="center"><a href="https://github.com/oPromessa"><img src="https://avatars.githubusercontent.com/u/21261491?v=4?s=75" width="75px;" alt=""/><br /><sub><b>oPromessa</b></sub></a><br /><a href="https://github.com/RhetTbull/osxphotos/issues?q=author%3AoPromessa" title="Bug reports">🐛</a></td>
     <td align="center"><a href="http://spencerchang.me"><img src="https://avatars.githubusercontent.com/u/14796580?v=4?s=75" width="75px;" alt=""/><br /><sub><b>Spencer Chang</b></sub></a><br /><a href="https://github.com/RhetTbull/osxphotos/issues?q=author%3Aspencerc99" title="Bug reports">🐛</a></td>
   </tr>
+  <tr>
+    <td align="center"><a href="https://www.cs.purdue.edu/homes/dgleich"><img src="https://avatars.githubusercontent.com/u/33995?v=4?s=75" width="75px;" alt=""/><br /><sub><b>David Gleich</b></sub></a><br /><a href="https://github.com/RhetTbull/osxphotos/commits?author=dgleich" title="Code">💻</a></td>
+  </tr>
 </table>
 
 <!-- markdownlint-restore -->