Add @igzivkov as a contributor

Author: Igor Živković

.all-contributorsrc

@@ -16,6 +16,15 @@
       "profile": "https://github.com/vitorarins",
       "contributions": [
         "bug",
+        "code"
+      ]
+    },
+    {
+      "login": "igzivkov",
+      "name": "Igor Živković",
+      "avatar_url": "https://avatars1.githubusercontent.com/u/1630197?v=4",
+      "profile": "https://github.com/igzivkov",
+      "contributions": [
         "code",
         "doc"
       ]

README.md

@@ -1,5 +1,5 @@
 # tinyproxy_exporter
-[![All Contributors](https://img.shields.io/badge/all_contributors-1-orange.svg?style=flat-square)](#contributors)
+[![All Contributors](https://img.shields.io/badge/all_contributors-2-orange.svg?style=flat-square)](#contributors)
 
 A simple Prometheus exporter for Tinyproxy.
 
@@ -25,8 +25,8 @@ Thanks goes to these wonderful people ([emoji key](https://github.com/kentcdodds
 
 <!-- ALL-CONTRIBUTORS-LIST:START - Do not remove or modify this section -->
 <!-- prettier-ignore -->
-| [<img src="https://avatars3.githubusercontent.com/u/1065028?v=4" width="100px;"/><br /><sub><b>Vitor Arins</b></sub>](https://github.com/vitorarins)<br />[🐛](https://github.com/igzivkov/tinyproxy_exporter/issues?q=author%3Avitorarins "Bug reports") [💻](https://github.com/igzivkov/tinyproxy_exporter/commits?author=vitorarins "Code") [📖](https://github.com/igzivkov/tinyproxy_exporter/commits?author=vitorarins "Documentation") |
-| :---: |
+| [<img src="https://avatars3.githubusercontent.com/u/1065028?v=4" width="100px;"/><br /><sub><b>Vitor Arins</b></sub>](https://github.com/vitorarins)<br />[🐛](https://github.com/igzivkov/tinyproxy_exporter/issues?q=author%3Avitorarins "Bug reports") [💻](https://github.com/igzivkov/tinyproxy_exporter/commits?author=vitorarins "Code") | [<img src="https://avatars1.githubusercontent.com/u/1630197?v=4" width="100px;"/><br /><sub><b>Igor Živković</b></sub>](https://github.com/igzivkov)<br />[💻](https://github.com/igzivkov/tinyproxy_exporter/commits?author=igzivkov "Code") [📖](https://github.com/igzivkov/tinyproxy_exporter/commits?author=igzivkov "Documentation") |
+| :---: | :---: |
 <!-- ALL-CONTRIBUTORS-LIST:END -->
 
 This project follows the [all-contributors](https://github.com/kentcdodds/all-contributors) specification. Contributions of any kind welcome!