docs: add justingrant as a contributor (jaredpalmer#622)

* docs: update README.md [skip ci]

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

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

Author: allcontributors[bot]

.all-contributorsrc

@@ -272,7 +272,8 @@
       "profile": "http://cantaloupesys.com/",
       "contributions": [
         "bug",
-        "ideas"
+        "ideas",
+        "question"
       ]
     },
     {

README.md

@@ -558,7 +558,7 @@ Thanks goes to these wonderful people ([emoji key](https://allcontributors.org/d
   <tr>
     <td align="center"><a href="https://github.com/gndelia"><img src="https://avatars1.githubusercontent.com/u/352474?v=4" width="100px;" alt=""/><br /><sub><b>Gonzalo D'Elia</b></sub></a><br /><a href="https://github.com/jaredpalmer/tsdx/commits?author=gndelia" title="Code">💻</a></td>
     <td align="center"><a href="https://patreon.com/aleclarson"><img src="https://avatars2.githubusercontent.com/u/1925840?v=4" width="100px;" alt=""/><br /><sub><b>Alec Larson</b></sub></a><br /><a href="https://github.com/jaredpalmer/tsdx/commits?author=aleclarson" title="Code">💻</a> <a href="https://github.com/jaredpalmer/tsdx/pulls?q=is%3Apr+reviewed-by%3Aaleclarson" title="Reviewed Pull Requests">👀</a> <a href="#ideas-aleclarson" title="Ideas, Planning, & Feedback">🤔</a> <a href="#question-aleclarson" title="Answering Questions">💬</a></td>
-    <td align="center"><a href="http://cantaloupesys.com/"><img src="https://avatars2.githubusercontent.com/u/277214?v=4" width="100px;" alt=""/><br /><sub><b>Justin Grant</b></sub></a><br /><a href="https://github.com/jaredpalmer/tsdx/issues?q=author%3Ajustingrant" title="Bug reports">🐛</a> <a href="#ideas-justingrant" title="Ideas, Planning, & Feedback">🤔</a></td>
+    <td align="center"><a href="http://cantaloupesys.com/"><img src="https://avatars2.githubusercontent.com/u/277214?v=4" width="100px;" alt=""/><br /><sub><b>Justin Grant</b></sub></a><br /><a href="https://github.com/jaredpalmer/tsdx/issues?q=author%3Ajustingrant" title="Bug reports">🐛</a> <a href="#ideas-justingrant" title="Ideas, Planning, & Feedback">🤔</a> <a href="#question-justingrant" title="Answering Questions">💬</a></td>
     <td align="center"><a href="http://n3tr.com"><img src="https://avatars3.githubusercontent.com/u/155392?v=4" width="100px;" alt=""/><br /><sub><b>Jirat Ki.</b></sub></a><br /><a href="https://github.com/jaredpalmer/tsdx/commits?author=n3tr" title="Code">💻</a> <a href="https://github.com/jaredpalmer/tsdx/commits?author=n3tr" title="Tests">⚠️</a> <a href="https://github.com/jaredpalmer/tsdx/issues?q=author%3An3tr" title="Bug reports">🐛</a></td>
     <td align="center"><a href="http://natemoo.re"><img src="https://avatars0.githubusercontent.com/u/7118177?v=4" width="100px;" alt=""/><br /><sub><b>Nate Moore</b></sub></a><br /><a href="https://github.com/jaredpalmer/tsdx/commits?author=natemoo-re" title="Code">💻</a> <a href="#ideas-natemoo-re" title="Ideas, Planning, & Feedback">🤔</a></td>
     <td align="center"><a href="https://twitter.com/diegohaz"><img src="https://avatars3.githubusercontent.com/u/3068563?v=4" width="100px;" alt=""/><br /><sub><b>Haz</b></sub></a><br /><a href="https://github.com/jaredpalmer/tsdx/commits?author=diegohaz" title="Documentation">📖</a></td>