Update README.rst

Author: yuin

README.rst

@@ -870,6 +870,7 @@ Libraries for GopherLua
 - `purr <https://github.com/leyafo/purr>`_ : A http mock testing tool.
 - `vadv/gopher-lua-libs <https://github.com/vadv/gopher-lua-libs>`_ : Some usefull libraries for GopherLua VM.
 - `gluaperiphery <https://github.com/BixData/gluaperiphery>`_ : A periphery library for the GopherLua VM (GPIO, SPI, I2C, MMIO, and Serial peripheral I/O for Linux).
+- `glua-async <https://github.com/CuberL/glua-async>`_ : An async/await implement for gopher-lua. 
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