Update Lua 5.3
Update Lua 5.3

moteus/lua-travis-example,daurnimator/lua-travis-example,xpol/lua-travis-example,istr/lua-travis-example,xpol/lua-travis-example,ignacio/lua-travis-example,moteus/lua-travis-example,ignacio/lua-travis-example,daurnimator/lua-travis-example,starius/lua-travis-example,istr/lua-travis-example,starius/lua-travis-example