docs: add MiguelSavignano as a contributor (#23)

* docs: update README.md

* docs: create .all-contributorsrc

.all-contributorsrc

@@ -0,0 +1,25 @@
+{
+  "files": [
+    "README.md"
+  ],
+  "imageSize": 100,
+  "commit": false,
+  "contributors": [
+    {
+      "login": "MiguelSavignano",
+      "name": "Miguel Savignano",
+      "avatar_url": "https://avatars3.githubusercontent.com/u/6641863?v=4",
+      "profile": "https://github.com/MiguelSavignano",
+      "contributions": [
+        "infra",
+        "test",
+        "code"
+      ]
+    }
+  ],
+  "contributorsPerLine": 7,
+  "projectName": "rubocop-linter-action",
+  "projectOwner": "andrewmcodes",
+  "repoType": "github",
+  "repoHost": "https://github.com"
+}

README.md

@@ -1,4 +1,5 @@
 ![rubocop linter actions banner](screenshots/rubocop-linter-action.png)
+[![All Contributors](https://img.shields.io/badge/all_contributors-1-orange.svg?style=flat-square)](#contributors)
 
 # Rubocop Linter Action
 
@@ -62,3 +63,19 @@ jobs:
 ## Recognition
 
 This project was originally forked from [gimenete/rubocop-action](https://github.com/gimenete/rubocop-action). Many thanks to [Alberto Gimeno](https://github.com/gimenete) for creating this project.
+
+## 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 -->
+<table>
+  <tr>
+    <td align="center"><a href="https://github.com/MiguelSavignano"><img src="https://avatars3.githubusercontent.com/u/6641863?v=4" width="100px;" alt="Miguel Savignano"/><br /><sub><b>Miguel Savignano</b></sub></a><br /><a href="#infra-MiguelSavignano" title="Infrastructure (Hosting, Build-Tools, etc)">🚇</a> <a href="https://github.com/andrewmcodes/rubocop-linter-action/commits?author=MiguelSavignano" title="Tests">⚠️</a> <a href="https://github.com/andrewmcodes/rubocop-linter-action/commits?author=MiguelSavignano" title="Code">💻</a></td>
+  </tr>
+</table>
+
+<!-- ALL-CONTRIBUTORS-LIST:END -->
+
+This project follows the [all-contributors](https://github.com/all-contributors/all-contributors) specification. Contributions of any kind welcome!