docs: add seohyun0120 as a contributor (#140)

* 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]

Diff for: .all-contributorsrc

@@ -261,6 +261,15 @@
       "contributions": [
         "translation"
       ]
+    },
+    {
+      "login": "seohyun0120",
+      "name": "Seohyun Yoon",
+      "avatar_url": "https://avatars3.githubusercontent.com/u/35247295?v=4",
+      "profile": "http://seohyun0120.tistory.com",
+      "contributions": [
+        "translation"
+      ]
     }
   ],
   "contributorsPerLine": 8,

Diff for: README.md

@@ -1,7 +1,7 @@
 # TypeScript-Handbook 한글 문서
 
 [![Build Status](https://api.travis-ci.com/typescript-kr/typescript-kr.github.io.svg?branch=master)](https://travis-ci.com/github/typescript-kr/typescript-kr.github.io) <!-- ALL-CONTRIBUTORS-BADGE:START - Do not remove or modify this section -->
-[![All Contributors](https://img.shields.io/badge/all_contributors-28-orange.svg?style=flat-square)](#contributors-)
+[![All Contributors](https://img.shields.io/badge/all_contributors-29-orange.svg?style=flat-square)](#contributors-)
 <!-- ALL-CONTRIBUTORS-BADGE:END -->
 [![Release Date](https://img.shields.io/github/release-date/typescript-kr/typescript-kr.github.io)](https://github.com/typescript-kr/typescript-kr.github.io/releases)<!-- RELEASE-DATE-BADGE:END -->
 [![Stars](https://img.shields.io/github/stars/typescript-kr/typescript-kr.github.io)](https://github.com/typescript-kr/typescript-kr.github.io/stargazers)<!-- STARS-BADGE:END -->
@@ -63,6 +63,7 @@
     <td align="center"><a href="https://velog.io/@eomttt"><img src="https://avatars2.githubusercontent.com/u/22593217?v=4" width="80px;" alt=""/><br /><sub><b>Hyuntae EOM</b></sub></a><br /><a href="#translation-eomttt" title="Translation">🌍</a></td>
     <td align="center"><a href="http://samsara-ku.github.io"><img src="https://avatars3.githubusercontent.com/u/59246456?v=4" width="80px;" alt=""/><br /><sub><b>Yunhoe, Ku</b></sub></a><br /><a href="#translation-samsara-ku" title="Translation">🌍</a></td>
     <td align="center"><a href="https://github.com/realgoways"><img src="https://avatars3.githubusercontent.com/u/15275415?v=4" width="80px;" alt=""/><br /><sub><b>realgo</b></sub></a><br /><a href="#translation-realgoways" title="Translation">🌍</a></td>
+    <td align="center"><a href="http://seohyun0120.tistory.com"><img src="https://avatars3.githubusercontent.com/u/35247295?v=4" width="80px;" alt=""/><br /><sub><b>Seohyun Yoon</b></sub></a><br /><a href="#translation-seohyun0120" title="Translation">🌍</a></td>
   </tr>
 </table>