Complete the contributors list

Fix #None

Author: Minggang Wang

README.md

@@ -18,7 +18,9 @@ rclnodejs.init().then(() => {
   node.spin();
 });
 ```
+
 ## Documentation
+
 - [Installation](#installation)
 - [API Documentation](#api-documentation)
 - [Using TypeScript](#using-typescript)
@@ -30,18 +32,20 @@ rclnodejs.init().then(() => {
 ## Installation
 
 ### Prerequisites
+
 Before installing `rclnodejs` please ensure the following softare is installed and configured on your systemd:
 
 - [Nodejs](https://nodejs.org/en/) version between 8.12 - 12.x.
 
 - [ROS 2 SDK](https://index.ros.org/doc/ros2/Installation/) for details.
-**DON'T FORGET TO [SOURCE THE ROS 2 SETUP FILE](https://index.ros.org/doc/ros2/Tutorials/Configuring-ROS2-Environment/#source-the-setup-files)**
+  **DON'T FORGET TO [SOURCE THE ROS 2 SETUP FILE](https://index.ros.org/doc/ros2/Tutorials/Configuring-ROS2-Environment/#source-the-setup-files)**
 
 ### Installing rclnodejs
 
 Install the rclnodejs version that is compatible with your version of ROS 2 (see table below).
 
 For the most current version of rclnodejs run:
+
 ```bash
 npm i rclnodejs
 ```
@@ -65,7 +69,7 @@ API documentation is generated by `jsdoc` and can be viewed in the `docs/` folde
 
 ## Using TypeScript
 
-`rclnodejs` API can be used in TypeScript projects. You can find the TypeScript declaration files (\*.d.ts) in the `types/` folder.  
+`rclnodejs` API can be used in TypeScript projects. You can find the TypeScript declaration files (\*.d.ts) in the `types/` folder.
 
 Your project `tsconfig.json` file should include the following compiler options:
 
@@ -106,8 +110,39 @@ Please make sure to read the [Contributing Guide]() before making a pull request
 
 Thank you to all the [people](CONTRIBUTORS.md) who already contributed to rclnodejs!
 
-[![](https://github.com/minggangw.png?size=25)](https://github.com/minggangw)
-[![](https://github.com/wayneparrott.png?size=25)](https://github.com/wayneparrott)
+<div>
+<a href="https://github.com/wayneparrott">
+  <img src="https://github.com/wayneparrott.png" width="30">
+</a>
+<a href="https://github.com/koonpeng">
+  <img src="https://github.com/koonpeng.png" width="30">
+</a>
+<a href="https://github.com/mattrichard">
+  <img src="https://github.com/mattrichard.png" width="30">
+</a>
+<a href="https://github.com/felixdivo">
+  <img src="https://github.com/felixdivo.png" width="30">
+</a>
+<a href="https://github.com/martins-mozeiko">
+  <img src="https://github.com/martins-mozeiko.png" width="30">
+</a>
+<a href="https://github.com/amikhalev">
+  <img src="https://github.com/amikhalev.png" width="30">
+</a>
+<a href="https://github.com/kenny-y">
+  <img src="https://github.com/kenny-y.png" width="30">
+</a>
+<a href="https://github.com/qiuzhong">
+  <img src="https://github.com/qiuzhong.png" width="30">
+</a>
+<a href="https://github.com/minggangw">
+  <img src="https://github.com/minggangw.png" width="30">
+</a>
+<a href="https://github.com/hanyia">
+  <img src="https://github.com/hanyia.png" width="30">
+</a>
+</div>
 
 ## License
+
 This project abides by the [Apache License 2.0](https://github.com/RobotWebTools/rclnodejs/blob/develop/LICENSE).