docs: add kaiwinter as a contributor (#1431)

* docs: update README.md [skip ci]

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

Co-authored-by: allcontributors[bot] <46447321+allcontributors[bot]@users.noreply.github.com>
Co-authored-by: Ilkka Seppälä <ilkka.seppala@gofore.com>

.all-contributorsrc

@@ -291,6 +291,15 @@
         "code"
       ]
     },
+    {
+      "login": "kaiwinter",
+      "name": "Kai Winter",
+      "avatar_url": "https://avatars0.githubusercontent.com/u/110982?v=4",
+      "profile": "http://about.me/kaiwinter",
+      "contributions": [
+        "code"
+      ]
+    },
     {
       "login": "lbroman",
       "name": "lbroman",

README.md

@@ -197,6 +197,7 @@ This project is licensed under the terms of the MIT license.
   <tr>
     <td align="center"><a href="https://przemeknowak.com"><img src="https://avatars1.githubusercontent.com/u/3254609?v=4" width="100px;" alt=""/><br /><sub><b>Przemek</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=pnowy" title="Code">💻</a></td>
     <td align="center"><a href="https://github.com/lbroman"><img src="https://avatars1.githubusercontent.com/u/86007?v=4" width="100px;" alt=""/><br /><sub><b>lbroman</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=lbroman" title="Code">💻</a></td>
+    <td align="center"><a href="http://about.me/kaiwinter"><img src="https://avatars0.githubusercontent.com/u/110982?v=4" width="100px;" alt=""/><br /><sub><b>Kai Winter</b></sub></a><br /><a href="https://github.com/iluwatar/java-design-patterns/commits?author=kaiwinter" title="Code">💻</a></td>
   </tr>
 </table>