Add @zzhangjii as a contributor

Author: saulshanabrook

.all-contributorsrc

@@ -81,6 +81,16 @@
       "contributions": [
         "financial"
       ]
+    },
+    {
+      "login": "zzhangjii",
+      "name": "Ji Zhang",
+      "avatar_url": "https://avatars3.githubusercontent.com/u/11495372?v=4",
+      "profile": "https://github.com/zzhangjii",
+      "contributions": [
+        "code",
+        "review"
+      ]
     }
   ],
   "contributorsPerLine": 7

README.md

@@ -1,7 +1,7 @@
 # jupyterlab-git
 
 [![Binder](https://mybinder.org/badge_logo.svg)](https://mybinder.org/v2/gh/jupyterlab/jupyterlab-git/master?urlpath=lab/tree/examples/demo.ipynb) [![Build Status](https://travis-ci.org/jupyterlab/jupyterlab-git.svg?branch=master)](https://travis-ci.org/jupyterlab/jupyterlab-git) [![Version](https://img.shields.io/npm/v/@jupyterlab/git.svg)](https://www.npmjs.com/package/@jupyterlab/git) [![Version](https://img.shields.io/pypi/v/jupyterlab-git.svg)](https://pypi.org/project/jupyterlab-git/) [![Downloads](https://img.shields.io/npm/dm/@jupyterlab/git.svg)](https://www.npmjs.com/package/@jupyterlab/git) [![Version](https://img.shields.io/conda/vn/conda-forge/jupyterlab-git.svg)](https://anaconda.org/conda-forge/jupyterlab-git) [![Downloads](https://img.shields.io/conda/dn/conda-forge/jupyterlab-git.svg)](https://anaconda.org/conda-forge/jupyterlab-git)<!-- ALL-CONTRIBUTORS-BADGE:START - Do not remove or modify this section -->
-[![All Contributors](https://img.shields.io/badge/all_contributors-7-orange.svg?style=flat-square)](#contributors-)
+[![All Contributors](https://img.shields.io/badge/all_contributors-8-orange.svg?style=flat-square)](#contributors-)
 <!-- ALL-CONTRIBUTORS-BADGE:END -->
 
 A JupyterLab extension for version control using Git
@@ -154,6 +154,9 @@ The Jupyter Git extension is part of [Project Jupyter](http://jupyter.org/) and
     <td align="center"><a href="https://amazon.com/aws"><img src="https://avatars3.githubusercontent.com/u/2232217?v=4" width="100px;" alt=""/><br /><sub><b>Amazon Web Services</b></sub></a><br /><a href="#financial-aws" title="Financial">💵</a></td>
     <td align="center"><a href="https://www.deshaw.com/"><img src="https://avatars0.githubusercontent.com/u/2298205?v=4" width="100px;" alt=""/><br /><sub><b>The D. E. Shaw Group</b></sub></a><br /><a href="#financial-deshaw" title="Financial">💵</a></td>
   </tr>
+  <tr>
+    <td align="center"><a href="https://github.com/zzhangjii"><img src="https://avatars3.githubusercontent.com/u/11495372?v=4" width="100px;" alt=""/><br /><sub><b>Ji Zhang</b></sub></a><br /><a href="https://github.com/jupyterlab/jupyterlab-git/commits?author=zzhangjii" title="Code">💻</a> <a href="https://github.com/jupyterlab/jupyterlab-git/pulls?q=is%3Apr+reviewed-by%3Azzhangjii" title="Reviewed Pull Requests">👀</a></td>
+  </tr>
 </table>
 
 <!-- markdownlint-enable -->