[ANN] lyaml 6.2.2 released

Read and write YAML-1.1 format files with Lua.

I am happy to announce release 6.2.2 of lyaml.

lyaml's home page is at http://github.com/gvvaughan/lyaml

## Noteworthy changes in release 6.2.2 (2018年03月28日) [stable]    
                                                                
### Bug fixes                                                   
                                                                
  -  Remove spurious dependency on `std.normalize` and `std._debug`
     libraries.                                                   

Install it with LuaRocks, using:

    luarocks install lyaml 6.2.2