[COMMUNITY] @kevinthesun -> committer (#2760)

CONTRIBUTORS.md

@@ -24,6 +24,7 @@ We do encourage everyone to work anything they are interested in.
 - [Haichen Shen](https://github.com/icemelon9) (PMC): @icemelon9 - relay, topi
 - [Zhixun Tan](https://github.com/phisiart): @phisiart - opengl, web
 - [Leyuan Wang](https://github.com/Laurawly): @Laurawly: - topi
+- [Yao Wang](https://github.com/kevinthesun): @kevinthesun: - topi, vision
 - [Eddie Yan](https://github.com/eqy): @eqy - runtime, autotvm, rpc, topi
 - [Lianmin Zheng](https://github.com/merrymercy) (PMC): @merrymercy - autotvm, topi, relay