Adding all-contributors support (#366)

Author: gargroh

.all-contributorsrc

@@ -0,0 +1,28 @@
+{
+  "projectName": "react-query",
+  "projectOwner": "tannerlinsley",
+  "repoType": "github",
+  "repoHost": "https://github.com",
+  "files": [
+    "README.md"
+  ],
+  "imageSize": 100,
+  "commit": false,
+  "commitConvention": "none",
+  "contributors": [
+    {
+      "login": "tannerlinsley",
+      "name": "Tanner Linsley",
+      "avatar_url": "https://avatars0.githubusercontent.com/u/5580297?v=4",
+      "profile": "https://tannerlinsley.com",
+      "contributions": [
+        "code",
+        "ideas",
+        "example",
+        "maintenance",
+        "review"
+      ]
+    }
+  ],
+  "contributorsPerLine": 7
+}

README.md

@@ -2579,3 +2579,23 @@ setConsole({
 
 - `console: Object`
   - Must implement the `log`, `warn`, and `error` methods.
+
+
+## Contributors ✨
+
+Thanks goes to these wonderful people ([emoji key](https://allcontributors.org/docs/en/emoji-key)):
+
+<!-- ALL-CONTRIBUTORS-LIST:START - Do not remove or modify this section -->
+<!-- prettier-ignore-start -->
+<!-- markdownlint-disable -->
+<table>
+  <tr>
+    <td align="center"><a href="https://tannerlinsley.com"><img src="https://avatars0.githubusercontent.com/u/5580297?v=4" width="100px;" alt=""/><br /><sub><b>Tanner Linsley</b></sub></a><br /><a href="https://github.com/tannerlinsley/react-query/commits?author=tannerlinsley" title="Code">💻</a> <a href="#ideas-tannerlinsley" title="Ideas, Planning, & Feedback">🤔</a> <a href="#example-tannerlinsley" title="Examples">💡</a> <a href="#maintenance-tannerlinsley" title="Maintenance">🚧</a> <a href="https://github.com/tannerlinsley/react-query/pulls?q=is%3Apr+reviewed-by%3Atannerlinsley" title="Reviewed Pull Requests">👀</a></td>
+  </tr>
+</table>
+
+<!-- markdownlint-enable -->
+<!-- prettier-ignore-end -->
+<!-- ALL-CONTRIBUTORS-LIST:END -->
+
+This project follows the [all-contributors](https://github.com/all-contributors/all-contributors) specification. Contributions of any kind welcome!