Add contributor

Author: dangvanthanh

readme.md

@@ -22,9 +22,9 @@ The screenshot shown is a combination of the following additional software:
 
 This theme is maintained by the following person(s) and a bunch of [awesome contributors](https://github.com/dracula/hyper/graphs/contributors).
 
-[![Dang Van Thanh](https://avatars2.githubusercontent.com/u/2674850?v=4&s=70)](https://github.com/dangvanthanh) | [![Zeno Rocha](https://avatars1.githubusercontent.com/u/398893?v=4&s=70)](https://github.com/zenorocha) | [![Haeseong Je](https://avatars3.githubusercontent.com/u/14370645?v=4&s=70)](https://github.com/HaeTheong) | [![Beau Allison](https://avatars1.githubusercontent.com/u/14225594?v=4&s=70)](https://github.com/beauallison) | [![Brandonptucker](https://avatars2.githubusercontent.com/u/1033893?v=4&s=70)](https://github.com/brandonptucker) |
---- | --- | --- | --- | --- | 
-Dang Van Thanh | Zeno Rocha | Haeseong Je | Beau Allison | Brandonptucker | 
+[![Dang Van Thanh](https://avatars2.githubusercontent.com/u/2674850?v=4&s=70)](https://github.com/dangvanthanh) | [![Zeno Rocha](https://avatars1.githubusercontent.com/u/398893?v=4&s=70)](https://github.com/zenorocha) | [![Haeseong Je](https://avatars3.githubusercontent.com/u/14370645?v=4&s=70)](https://github.com/HaeTheong) | [![Beau Allison](https://avatars1.githubusercontent.com/u/14225594?v=4&s=70)](https://github.com/beauallison) | [![Brandonptucker](https://avatars2.githubusercontent.com/u/1033893?v=4&s=70)](https://github.com/brandonptucker) | [![xmatheus](https://avatars2.githubusercontent.com/u/34286800?v=4&s=70)](https://github.com/xmatheus) |
+--- | --- | --- | --- | --- | --- | 
+Dang Van Thanh | Zeno Rocha | Haeseong Je | Beau Allison | Brandonptucker | xmatheus |
 
 ## License