Outdated version in LuaRocks and Releases page

[GitSparTV]

Hi. Currently master branch has 2.1.0.12-1.rockspec file, and the reader might think it's for 2.1.0.12-1, but the content of the file says 2.1.0.11-1. However, in tags there is already 2.1.0.13 with the same outdated .rockspec, and meanwhile in LuaRocks only 2.1.0.10-1 version is available.

I would like at least to sync the latest version in LuaRocks.

[GitSparTV]

Continues discussion in https://github.com/openresty/lua-cjson/issues/96